I'm a big one for nice triggers.
I really like a nice trigger. But, how nice is nice? And, what will it do for you on paper?
I recently put about $160 or $170 in an Apex trigger kit for my M&P 2.0. Even the word AWESOME will not tell you how nice that trigger is now. Better than any other striker fired pistol I own or have ever shot. Better that most of my CZ hammer fired pistol triggers. It really is.
But it didn't do a darn thing to help me shoot better groups from that pistol. The addition of an Apex fitted barrel (fitted by me, not Apex, but it's a barrel that is oversized enough in places that you have to remove some metal to get it to function and when you do it right you get a nice snug fit - well, better/tighter than the factory barrel) did way more for tightening up the groups than the nice trigger.
Best groups I've gotten from a CZ are two stock pistols. A P07 and P09. Trigger are pretty decent. I have three other CZ's with nicer triggers that still don't shoot the groups that P07 and P09 shoot.
I think Joe mentioned one time that he worked on his CZ97 till it had a real nice trigger and after some practice he decided he shot it better when the trigger pull wasn't as nice/crisp. Joe, please correct me if I remember that incorrectly. It just stuck with me because I was always a believer in a nice trigger is always better.
Not trying to talk you out of working on it/buying parts for it to make the trigger "nicer." Just saying that a nice trigger doesn't always equal better groups.
I guess there are times when you can get a CZ with a trigger so darned ugly/terrible you just have to do something. I bought one of those one time. Converted it to SAO. Worst trigger (gritty, rough, bumpy, draggy, dodgy, etc., etc., etc.) I ever pulled on a CZ and worse than a dang Glock or M&P factory trigger.