I live in North GA so Verizon has been the only viable option for as long as I can remember. As of late, between them having a few weak spots and deciding to up their plan prices, I decided to see if T-mobile was really as good as they claim they've become.
Short version: yes. Average data rate is faster than verizon, and the coverage is as good or better.
While I thought this would open me up to the world of International GSM phones, (more pointedly, the Z5 Compact from Sony), it turns out much of their build-out is from the 700mhz spectrum which requires Band 12. fine on tmobile phones or iphones, not fine due to moronic Sony managers.
Here's to waiting for Sailfish.