I just switched to Sprint 2 weeks ago after being with AT&T for 9 years. In my area (Indianapolis) I haven't noticed a single difference. If anything, it's actually gotten better, service-wise. Guess I got lucky.
Also, just ran a speed test over LTE.
39 ping.
42.17 Mbps down.
4.54 Mbps up.
Not sure what I was getting before this "LTE Plus" business.
Hey not bad at all, sounds like Tmobile it all depends where you live/use your service.
-Mike