I have had tmobile for 5 years in San Diego county. I traveled a lot for work and had no issues with their service. I live in SEH and the service is spotty due to lack of towers in the area. I have a mytouch4g, my bill is 75 a month for unlimited everything I can use wifi for phone calls and data surfing when in my home since the signal is bad. I can also use my cell FOR FREE as a mobile hotspot. These last two features are all the reason why I chose to stay with tmobile over the assraping verizon and ATT give you on pricing of comparable features.
Im sure people will complain about tmobile or the fact that AT&T will take them over but my plan will be grandfathered, like they have been doing since the 90s when cell companies started taking over other companies. My mom had a Comcast Cellular plan she got on in 1998 for 19 a month and had that until last year on AT&T. It didnt get her much but it was dirt cheap.