I love how easy it is to use this app! It allows you to see who's calling you without having your phone by your side all day long. You can take calls from multiple phones at one time as well so that makes my job easier when attending meetings or conferences with clients/customers etc. Nothing really. Sometimes we have issues with some features not working properly but they're usually fixed very quickly. Just make sure there isn't an issue before purchase otherwise after purchasing if things don't work perfectly then contact support immediately for help. This helps me keep track of client appointments in real-estate salesmanship field where i'm currently employed. As mentioned above sometimes problems arise due to bad internet connection which leads to slow down in loading images however customer service always solves these problems within minutes. So far everything has been good except minor issues here and there such as slowness during image load up (due to connectivity) - solved almost instantly upon contacting their.