Buying a Gophone and testing out the area was a good idea, because as you've stated coverage is highly dependent on your location. I've been using ATT for about 5 years now in the Seattle area and it has been working great for me. Good voice and data coverage, with excellent data speed. I've also taken several 2 week road trips all along the West and Southwest (Washington state, Oregon, Calif, Arizona, Utah, Nevada, Idaho) and the cell-data coverage has been very good. I've also found customer service in their local stores and online has been excellent. The only negatives I've found is that their smartphones can be higher priced than the other carriers, and their unlimited data plans seem higher too.