A lot of valid points in this thread. I've been following it for a while but haven't decided to post until just now.
Disclaimer, I am a T-mobile Customer and I agree with the OP on the original topic about how T-mobile is fantastic, at least in my experience. It seems that the thread has turned into a bit of a spitting contest since the original post but I digress.
For me and many others T-mobile offers great service and great value. It doesn't matter to me if the other carriers have coverage in the far reaches of the country since that does not effect me. T-mobile works well in all areas in which
I need, and thats all that I can ask. I do travel but most of the time its by airplane and I'm always covered in the cities I frequent. In my experience, I've always had at least some sort of signal when traveling by highway. I may not have LTE, but as long as I can make a phone call and send/receive a text message (which I have always been able to do) I'm content. I'm usually the one who's driving so data is of little concern to me.
T-mobile works great 99% of the time for me. I concede that I may "suffer" edge speeds or even worse no coverage out in the boonies, but I don't see a need to pay extra for that 1% of the time. T-mobile works when and where I've needed them to, and Im sure many other people feel the same way.
Now of course everyone has a different experience depending on their own needs. For ME T-mobile works great, for others it may not. Again it all depends on PERSONAL needs. I find it silly that people feel the need to nitpick another carrier or a individuals choice of said carrier because theirs is bigger, faster, better. If it works for them, Great! They're happy with theirs and you're happy with yours. Win-win for everybody
Personally, I'm glad that we have the ability to choose from a variety of carriers. Not to mention with all of the "Un-Carrier" moves by T-mobile, the other carriers are being forced to respond with moves of their own. The consumer is the true winner here. Competition is good for everyone.