I love how easy this was to integrate into our website, along with their mobile app which is great! There's not much that we dislike as of yet - but perhaps more space? It would be nice if it could go further down each line than just three lines; however everything else about its use so far has been extremely simple & straightforward (even though there are many different ways you're able to implement). We've already noticed an increase in traffic when customers scan one! As mentioned above, there really isn't anything specific at present aside from maybe adding some room below/next level up or something like that? But honestly nothing too major otherwise all went well once integrated!!