Verizon for a little over 2 years. I had an issue in central Wisconsin the first year we returned to the area. After 3 months and several tries by Verizon engineers to find the problem, they credited us for 3 months of service. The problem. I was able to connect using the USB modem and showed a full strength signal and had -64 dbi but my Internet speeds were slower than the slowest dial up. You can't even imagine how slow it was. Based on the fact they tried hard to help and gave me a credit, I believe Verizon to be the best choice. We have had no issues anywhere else. In fact, in the same area we had trouble 2 years ago, we now get good speeds.
Go Figure...