Better than Glock. It is rumored Canik used the Walther P99 trigger system that just went out of copy protection. Personally, looking at the two, yes-that's probably true. The Canik has larger parts, but nearly the same in appearance. Given the Canik/TriStar line is just copies of others (CZ), it also is probably true.
The original TP9 was nearly exact to the P99AS system. TP9 = P99AS, TPSA = P99QA (replaced by the Walther PPQ-though they were made years together), TP9SF = PPQ, TP9SF Elite & Elite-S = PPQ M2 in barrel length and grip and PPQ M1, and TP9SFX = PPQ 5" and PPQ Q5.
Better triggers than Glock. I personally do not find them equal or near equal to the smoothness of the Walthers. They are spoogier too. Additionally, I had problems with 4 TP9SFs having safety blades that could lock up the trigger if not pressed square on.