Most people would rate TC's customer service very highly. Just be forwarned, if you send them a frame for repairs that had the trigger worked on by anyone other trhan TC, they will change it back to original factory specs. They also tend to replace rather than repair.
I sent a four digit SS Contender frame in for work and got back a new frame instead. Wasn't happy as I thought the four digit might appreciate in value. Same story for my four digit Thunderhawk, rather than make what I considered a simple repair, I got a new barrel. Now I don't know about you guys but once I "blood" a gun i get rather attached to it and develop confidence in it and I wanted to keep the four digit serial numbers.
Now, with the new Thunderhawk barrel, I'm back to square one developing loads and getting that confidence back.
I've been a TC owner since 1984, and an ardent fan. But in the last several years I've seen them slipping. I hope they wake up soon.