UPDATE : Customer support was fast, they are working on it.

I installed the app, and it says : "You are not logged in. Please access this page from your Shopify admin." And of course, I can't save anything.
I AM LOGGED IN, as I click on it as admin, on the APPS tab, IN MY SHOPIFY STORE.

good price for good app, recommend to other customers
only thing is confuse how to setup the design and things

I was looking for ages to add a but button on the collection page ! I will prefer to have a trial session in order to test the app. However, it's easy to install and set up. I recommend it.

Works exactly as promised. Provides a nice visual for customers to make certain their orders are getting sent to the cart.

Using as a trial on my new online store. I am new but have great expectations. At the very least it looks like a cart and not a bar at the top or bottom of the page. I wanted it in the middle but there aren't any options for that choice.