Outstanding support from Katie and Lulla! They helped resolve several issues and even took care of some personal customization requests I had. Hands down the best cart app I’ve used!

I've experiemented with a few cross sell apps and this is by far the most feature rich. I had a couple of changes that I needed and Lulla and the support team were very responsive and friendly.

I've been using OPUS since it was a startup, and I can confidently say it’s the best cart app I’ve ever worked with. Over the months, as my business grew and my needs evolved, OPUS kept improving right alongside me. I haven't found another cart app that comes close to meeting my store’s specific requirements — and believe me, I’ve tried a few. What truly sets OPUS apart is not just the functionality, but the incredible support team behind it. A special shoutout to Katie, David, and Lulla — they’re always available, providing prompt, helpful feedback, and going above and beyond to assist whenever needed. Since my store sells personalized products, setting up and optimizing the cart required extra attention and customization. The OPUS team handled this flawlessly, tailoring solutions that worked perfectly for my unique setup. If you’re on the fence about which cart app to choose for your Shopify store, don’t hesitate — go with OPUS. It’s powerful, reliable, and backed by a team that genuinely cares about your success. I simply love it!

Banger App. It has really everything you need from custom css to even custom skript where you can hire a dev team to get that done. Lulla helped me out of the trenches real moggerina she does a great job

Great product and excellent customer service. I highly recommend it.

Amaazing very fast support from LULLA and David, within minutes we had a fix and solution - great app!!

Really love this app! Super easy to set up upsells and bundles, took me like 10 minutes. The pop-ups look clean and fit well with my store, and I can see exactly how much extra sales they bring in. It helped me increase my average order value without slowing down my checkout. Support is also quick and helpful whenever I need something. Highly recommend if you want to get more out of your Shopify store without any complicated setup!

Great app and wonderful customer service.

Great app! One of the best support teams. They solved me a little issue with codding within seconds. The upsell cart is one of the smoothest in this category.

This cart recommendation app has been very effective for our store. A special thanks to Katie for her patient and helpful support during setup—she made the integration process smooth and stress-free.

I love you Lulla, you are perfect!

Amazing support team, helps you with everything, even in free plan

Quick support from LULLA, thanks.. easy to set up app, looking forward to have fun using it.

Merci infiniment pour votre réactivité

Just started using the app and love the customization! I've used other Upsell cart drawers and this interface is more friendly, more customizable, and the service is top notch! Thanks Lulla, Vivian, and Mia - you're amazing!!!

Opus cart upsell is good. Its has many options to help suit it to your needs. The Opus team also helps you with modifications. The pricing is reasonable as well. The only drawback is the analytics sometimes aren't tracked well.

Outstanding Support – Huge Thanks to Katie & Lulla! The app itself is super intuitive and does exactly what it promises — but what really stood out to me today was the exceptional support. I had a few custom implementation questions and both Katie and Lulla went above and beyond to help. They were fast, knowledgeable, and genuinely cared about solving my issue — not just giving a generic answer. It’s rare to find support this good, and they made the entire experience smooth and stress-free. Massive shoutout to Katie & Lulla — you two are rockstars! Highly recommended — both the app and the amazing team behind it.

This is hands down the best app out there! The support is absolutely outstanding – no matter when you reach out, someone is always there to help, and they truly go above and beyond to make sure you're satisfied. I'm deeply grateful to Lulla, Vivian, and the entire dev team. You're doing an amazing job – thank you for being there!