The only problem that I have had is that my slide locks back with one round left in the mag every time. Other than that I love mine.
It wasn't mine, but at a get together we all shot one of the participant's TCM. After about 3-4 magazines the recoil spring broke. It was brand new prior to that day. I have no idea if its common or not.
TCM has an 8# recoil spring. I have a full size and commander and never a problem with either. I've probably got a couple hundred rounds through the commander (haven't shot the full size much since getting the commander) and it's one of the most enjoyable pistols I have to shoot. Very low recoil, very low effort required to retract the slide. Recoil is probably 30% of the 9MM, actually not a lot more than the SR-22 Ruger. It does have quite a "pop" when you fire it but I've yet to have someone shootthat didn't say they enjoyed it.
[FONT=&]NRA Life Member[/FONT][FONT=&]-- [/FONT][FONT=&]GSSF member[/FONT][FONT=&]
[/FONT]Ruger MK III, M&P & 1911mechanic
NRA Basic pistol instructor[FONT=&] –[/FONT] Certified Glock armorer