Works great on the Rogers network up here in Canada with 3G coverage being quite good. 

Interestingly enough on a trip down to Denver and San Francisco last week I had to turn 3G off as the Bold and AT&T didn't play well together. With 3G on I would get frequent data connection drops and very slow performance. Forced to 2G mode things worked perfectly.

Further interest is that 2 weeks ago when in Zurich the Bold worked flawlessly on the SwissCom and Orange networks with no issues with 3G on either.

CC