The most useful features are being able to scan/add items into my cart easily from any point throughout our store! Also there aren't many other customers around so you can pretty much do your own thing at that time with little trouble; just make sure someone is close by if need be or bring headphones for some peace & quiet (which I sometimes like). As previously stated it makes scanning things very easy especially when you're doing multiple scans per transaction which comes up quite often since we stock mostly food products - but then again this isn’t necessarily one issue only people purchasing groceries have faced before using standard app!