the app is very nice, very fast to load and offer many customisation at a very reasonable price. Customer service is also very helpful.

Fantastic support! Fast, easy and flexible! Will definitely use this app for more of my Shopify stores. Big thanks to VIVIAN, LULLA and AYLIN!

Great app. Full of key features and looks very sleek in the cart. Lucas and Ryan helped a lot in custom support.

The customer support at Opus is next level, they are always patient and they make sure they help you out to the best of their ability even if the problem seems really technical or hard. I was really pleased to be helped by Vivian and Ryan in the developer side, the work they do is really A+ and I will even want to have them in my personal store because of how good they do their work. Never imagined Opus will have developers at their disposed, many apps when the problem is really technical they always follow up with your problem and it even takes days to get resolved but in Opus their developers are like customer support agents that they are available whenever needed. Very much recommended app way better than UpCart too and the cart drawer even looks better and is more customizable!

Vivian from Opus Cart Upsell has been absolutely amazing! She went above and beyond to help me set up and customize the app to fit my store perfectly. Her responses were fast, clear, and super friendly — she made the whole process smooth and stress-free. The app itself works great and has already improved our upsell conversions, but what really stands out is the quality of support. Having someone as attentive and knowledgeable as Vivian makes a huge difference. Highly recommend both the app and the team behind it!

Vivian y Mia ha sido una gran ayuda para solucionar un gran problema que tenia de integración con otra app, muchisimas gracias al equipo!!

This app is super useful and truly the best in the market! The Opus Cart has significantly improved our store's conversion rates and the slide cart feature works flawlessly. I want to give special recognition to the support team - Vivian, Lulla, and Beeter have been absolutely exceptional. They responded quickly to all my questions, were incredibly patient in walking me through the setup process, and went above and beyond to ensure everything was configured perfectly for our store. Their professionalism and dedication to customer success really sets this app apart. Highly recommend both the app and their amazing support team!

Application Parfaite et service client très réactif ! J’avais une idée précise de la barre dans le panier et ils ont réalisé exactement ce que je voulais en un temps record ! Ça marche parfaitement et ça a augmenté mes ventes de façon spectaculaire ! Merci

Amazing App & Excellent Support! } This app has been a great addition to my store — it’s easy to use and really helps improve my workflow. The support team is outstanding — they respond quickly and go above and beyond to help with any questions or setup issues. I highly recommend this app to anyone looking for reliable features and top-notch customer service!

The team was incredibly patient and reactive with all our customization requests. Special thanks to Lulla for her help. Highly recommend !

Highly recommend this app. LULLA and KHANG were very helpful with quickly adding some features we needed.

I had really high hopes for this app! It allowed me to achieve the 2 things I wanted that I didn't find in other apps: 1) Add a 2-milestone progress bar to my cart 2) Add simple upsell / product recommendation in-cart to boost AOV. Where it fell short for me: -It replaces the existing Shopify cart page. This isn't necessarily bad, but it felt a little buggy in some ways -- didn't always scroll consistently and I'd see the page behind the cart page scrolling sometimes. When clicking back to "cart" from the native Shopify checkout page, it navigates to the legacy native Shopify cart page instead of Opus. -The BIG one: Detrimentally impacted key conversion and AOV metrics. I watch my Shopify Analytics like a hawk and I noticed that the Checkout conversion rate metric was declining and my overall Conversion rate metric was gradually trending down. I had this app installed from Oct 10-Oct 31st, so I gave it 3 weeks. My checkout conversion rate fell from ~70% down to 59% over those 3 weeks and my overall conversion rate fell ~0.5%. Not apples to apples since it wasn't an actual split or A/B test, but it was enough to convince me to course correct. On top of all that, my main goal of boosting AOV with a 2nd milestone in the progress bar wasn't achieved. My AOV actually fell almost $1 over that time period. Again, not apples to apples with an actual split test, but this made it easy to pull Opus from our store. In the 4 days since swapping out, checkout conversion rate jumped 5% and but AOV has not recovered. It's entirely possible that I didn't design my cart optimally with their app, but I did my best to keep it simple and minimal. Opus is a good idea and offers a strong feature set, however, here's a warning to test and monitor your metrics as you swap a critical function out such as a shopping cart.

So far has been a great app! Had some requests for changes, and the team have been super helpful in getting them done.

Great app. Easy to use. A few very important enhancements needed: 1) ability to change the font style in the cart. 2)the cart's "continue shopping" link to bring the customer back to shop for more is too hard to find. Should be moved up to the center of the cart and we need to be able to modify the look of this super important link.

The support team was incredible! They are fast, responsive, and truly respect your time—no unnecessary explanations or delays like you often experience elsewhere. Vivian, Lulla, and Beeter were all extremely helpful throughout my experience.

The support team was incredible! They are fast, responsive, and truly respect your time—no unnecessary explanations or delays like you often experience elsewhere. Vivian, Lulla, and Beeter were all extremely helpful throughout my experience. However, I want to emphasize that an app managing the Cart Drawer is a very responsible and sensitive component of any shop. It’s crucial that the development team thoroughly tests all code changes before releasing updates to ensure full compatibility with the theme and others apps installed. Since I’m not a programmer, I can’t effectively test for bugs or know which cases to check, so relying on users to report issues is risky. For an app that directly affects customer orders and revenue, rigorous internal testing is essential to avoid potential errors that could cause loss of sales and trust. I hope that developers prioritize thorough testing before releasing any customer-requested changes.

The app they built is absolutely amazing, and their support team was incredible! They’re fast, responsive, and truly respect your time — no unnecessary explanations or delays like you often get elsewhere. Vivian, Lulla, and Beeter were all extremely helpful, and the development team worked quickly and efficiently to deliver outstanding results. I highly recommend them!

Intuitive Bedienung und alles was man für seinen Shop im Bereich "Warenkorb" braucht. Top!! Vielen Dank auch an LULLA und MIA für den großartigen Support! :)

We so grateful for the amazing support from LULLA and MIA They were incredibly kind, patient, and helpful throughout the whole process. The app works beautifully and it’s clear the team truly cares about their users. Thank you for making my experience so wonderful!

We run a large Shopify store with heavy traffic, especially during peak seasons like this. Finding Opus has been a real blessing - it’s fast, clean, and super easy to use even at scale. The upsells work amazingly well, and what stands out most is their support team, which is always there, responsive, and willing to help with anything anytime. Highly recommend!