Poor interface. Each time you open you have to login again, does not remember settings. If you power down a device it will not reconnect unless you remove it and add it again. The feedback font and other input areas are white on white so you cannot read the text unless you scroll back over it. The controls work in opposite - off switches on, on switches off, temp up is down etc. If you go to scan area and accidentally don't give access to camera (like I did) it locks in that area and there is no way back. Each time you restart it's locked in that area until you reinstall. Needs some work yet.