So far it's very simplistic and works great. Video and Audio quality are excellent. It's tied to your number only, not your Google account. Works cross platform on Android and iOS. You can also use it on an tablet or device without carrier or sim. For example: You can tie it with a Google Voice number. Then receive the text and type in the text code. Update: I tried to tie the same number to more than one device, doesn't work. It will just deactivate the other device once you input the code they texted to you.