I purchased the linksys box for VoIP for Vonage at bestBuy. No setup costs for the account and I think I got a free month as well. The quality I had to knock down using their bandwidth saver to the middle option cause I would get calls randomly drop but after lowering it I have had no problems. Now the calls sound like a very good cell phone call. and I get caller id information (name and number) for just about everyone think i have had only one that was hidden cause someone did the whole *something code to block it. Over all I like it and will stay with it. Oh and I have comcast cable internet. I also have been on the phone while 2 computers are playing internet games and had file transfers going at same time. I would highly suggest using it.