I use Virgin Mobile, which uses Sprint's network, and was in Prov and at Brown dropping my D at Summer@Brown last week.
It was meh. On campus it was fine - in D's dorm room, on the green and in the couple of buildings I was in I had no problem.
On the commercial part of Thayer St and around College Hill, I often lost signal. Coming from OH, where Sprint is amazing, I was disappointed.