yes it will use your minutes. for now, i think the only way to save money using GV is if you have the fav 5 with tmobile or the new alist with att, wheere you can progam one of your numbers to your gv number...then its free.
i dont have that...i just use my gv to mess with my friends. and look cool
I guess the only bonus is getting your own number, unlimited SMS and cheap international calls. None of which I need. Damn. I felt so lucky to get my invite one day after requesting it.