Engadget - It may be an expected holiday gift, but it's still a nice one: Google's VoIP service in Gmail will remain free of charge for calls within the United States and Canada in 2013. A note on the Gmail Blog announced as much today; the news ushers in a thrilling third year of free Google Voice service for US and Canadian customers, right through the standard Gmail interface.
But you can still go back to the old layout if you prefer.
Overall, this looks like a decent UI update for people that use multiple Google services.
Spam runs rampant on Gmail, but you have options.
I Absolutely positively abuse gmail voice wherever & whenever I can.