I have been working with Shopbeacons for almost 2 years now, they are always willing to help you out when ever needed! They know so much about their products that it helps me pick my next product even before i come across them online or offline (I don't like going into stores without doing some research).
Sometimes there is lag time between updates but other than this nothing too bad!! It's great having an app where all your information can be stored at once instead of carrying around receipts everywhere :).