I live in the Cool Springs area and it has always been like that. Data speeds are really slow. I use Lg G2 which is a tri band phone.
There used be a lot of call failures earlier but they seem to have fixed it.
Another wierd issue I observed in this area in the past was that time on the phone sometimes changed to EST all of a sudden. I thought it was an issue with the phone but then realized it to be a network issue when the same thing happened on a different phone. Alarms would go off an hour early because of that. They seem to have fixed that issue too.