We used our cell phones with laptop for internet access on a few occasions, at two different sites. If you are used to DSL speed, it will make you crazy how slow it is! Also, signal was very spotty and, on more than one occasion, we literally had to hold the phone a certain way in order to maintain the signal.
It isn't too bad if you only need to do a little on the 'net, but gets very frustrating if you are thinking of doing much online.