Very quick response, simple and seamless integration from Vivian! As you know, I don't require a plug-in to be perfect. There is no perfect thing in the world. The most important thing is the right one. What really makes people feel at ease is the meticulous service.

Good app, and very helpful customer support, support agent Lulla really stands out in her customer service abilities!

This plugin is amazing! It integrates multiple functions, allowing me to set up various activities simultaneously. Additionally, the online support staff（KATIE） are truly outstanding. They provided me with prompt and professional answers, which were extremely helpful.

Opus Cart Upsell Cart Drawer proved to be the best shopping cart option for my store, with great value for money and excellent features even in the free version. In addition, the support was extremely efficient, helping me every time I needed it so that everything worked perfectly on my website. All the support staff were wonderful, especially Lulla, Katie and Vivian.

Great app and very helpful support. I am still trying to resolve an issue caused by a third-party app. The issue is not yet resolved, but the support is so friendly and responsive and really willing to help. Also this issue has nothing to do with their app themselve. The app works like a charme, doing exactly what it should do!

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.

One of the best support teams I've encountered on an app. Lulla was very helpful and even went out of their way to optimize my cart design to better match my store. 10/10.

The freedom to customize if better than any of the other cart apps I've tried. I had an excellent experience with Opus Carts support team. Very quick to respond, (faster than another popular app I was previously using) they helped me fix my exact problem, quickly making sure it's exactly how I wanted it. Best cart app I've tested.

We asked Lulla for a custom code on the cart and she immediately got the dev team on it. Super fast and helpful support, really appreciated, especially at this hour. Amazing experience!

Best cart builder on shopify for sure, customer service really helpful (katie was great and real helpful, she deserves a raise) they actually help you for real

Merci beaucoup à Lulla ! Elle a réussi en quelques minutes a régler tous les soucis d'intégration que j'ai pu rencontrer, merci encore ! Et l'application est top et très complète !

Incredibly powerful app that's already generating more orders to my business. Their helpful supportive team have been amazing, in particular Vivian and Lulla to get the app fully integrated with my website. I have tested many cart apps and Opus is by far the best.

Lulla from the support tean was really helpful during the setup. I appreciate the quick reply and easy setup. We will test for CVR uplift with the app. Thank you.

The app is great! You can set it up quickly and it really allows for excellent customization. I requested a modification to a button, and Katie's support was very fast and efficient. She passed the request to the development team, where Mia made the changes in no time. I'm very grateful to both of them.

LULA IS THE BEST COSTUMER SERVICE IN THE WORLD. She help us beyond our requirements. Quick, smart and very kind. With love, EASYPROTEIN TEAM.

100% very good app, lots og help with customizacion from ryan and vivian went extra mile, and the app is really good.

KATIE provided excellent support. She responded quickly in the chat and was very kind in addressing my requests. I highly appreciate both the quality of this app and the support provided.

Great App I think in future this app can be improved more and more currently they have improved very much and their staff is really amazing and solves the issues quickly and always ready for help Specially LULLA & KATIE Thank you.

Great customer service - super fast and responsive. They helped write custom CSS code to further customize the cart to better match my site theme settings. Shout out to Customer Service Rep Lulla :)

Excellent App, Special Thanks to Katie and the developper Mia. They took the time to fix my issues. Thank very much !!