I like how easy it is to use, no confusing instructions or anything of that sort! It works great for my clients who suffer from anxiety when they are in public places such as stores etc...It's helped them greatly with their shopping experience by keeping me calm during this time which has made things easier than ever before!! Nothing at all really because everything seems fine so far but if there was one thing i would say maybe make sure you have an account set up first just incase something does go wrong down-the road (which hasn't happened yet).