I'm using one as a business line, but would not recommend it. There's a brief period of silence before connecting, which results in constant 'do you hear me' questions, and generally poor voice quality overall.

I like the attempts at transcription for voice mail, but find the voice mail difficult to configure otherwise. Sometimes I get messages on the ring-to phone, sometimes on GV. There's no way to set the number of rings before pick up.

I'm having a much better experience with standard VOIP numbers through Callcentric, to the point that I'm looking at trying to port out the Google Voice number. Has anyone had any success in porting a number out?