I have tried couple of App builder deals here on AppSumo and by far this is the best one for me. Why?

The limit they are offering are very generous, unlimited users, notifications, designs and e-commerce product. They also have good components that can be use.

I see a lot of potential on their platform and now they have Shopify module which is a plus.

My only comment would be the overall designs and template available, it is very limited as of now and the UI needs to be revamped.

But overall it is a solid platform for those who wants to have apps without coding.