Lacks some features that should be built into the button including more layout options.

Also had to hand code each button to route to the correct domain instead of the shopify.com checkout domain. Fix this please.

I love the idea, but there are things that should be fixed ASAP.
1.) It's painfully slow, endless number of requests needed in order to load the iFrame.
2.) Not customizable.

Does not work for embedding in Tumblr posts as advertised. The HTML elements are ignored and converted to a single text link.

Variant selection dropdown also disappears.

Great concept. But doesn't work as advertised. Hoping for Tumblr updates and a future five-star review!

Minimally functional. No way to configure the embed code (like add an affiliate code), or even track sales from the different sites that have embedded the code. I guess if you want to embed items from your store in several sites that you own, and don't care about tracking, this is fine. But I think Shopify didn't think through the functionality that current stores would actually need.

This app needs work. For us clicking the BUY Button would be best if the products go in to a shopping cart on our website (instead of a cart on the blog) ,then customers would have access to all our products. This limits them to purchasing only the products listed on our blog. It also has issues that are not the best when a product has variants. We tried it, but it was not something that worked for us. Looking for something else that will work for us.

No styling of the button other than color is allowed. Would give 5 stars if it allowed padding and margin, width, height, centering, fonts, and the ability to change the fixed cart widget on the right.

Until then, this is mediocre at best.