COMPLETE SCAM!
I can only recommend to stay away from this service. It will be devastating. Suddenly my phones do not work. When you contact the arrogant and lazy support they are very disinterested and tell you that all devices made before some day of last month do not work any more. They do not care if these devices were paired with important accounts and if you can't pair them with new ones. They have no interest if this is destroying your business. They just take your money and ignore you. THIS IS SCAM! STAY AWAY! Use the other good working alternatives - there is a lot of it. But do not use this ignorants that do not care for their customers.