It's easy to use - just download it onto your phone/computer (or both!) then take screenshots when you're trying items on so that later you can compare what looks like exactly as well! You also have several zoom levels available which helps with accuracy. The only issue I've had is not being able to access my previous photos through their app if they delete them from another account. Make sure to follow their instructions carefully about uploading images. We are now always comparing our outfits before we go out because there may be something different between us & the photo vs actual item purchased. Also saves time by getting immediate feedback without having try on clothes in store.