I've had one and shot several others. Some come with a good trigger, some with a mediocre trigger, but they can be tuned pretty easily. Unlike the DA/SA guns, there's not as much improvement with dry-firing or a lot of rounds fired. I hear everything from complaints to raves about the out-of-the-box trigger. If you can examine one before you buy, you can avoid a hassle.
The SA model can be had with a two-way adjustable trigger that lets you reduce take-up to almost nothing, and reduce overtravel, as well. If it doesn't come that way (with THAT type of trigger), you may want to see about getting the trigger.
The SA is not physically the same as a standard 75B: it has larger, ambidextrous safeties, a larger, extended beavertail, and the slide is slightly different. I think the mags will drop fee, too.
You can buy the SA models from the CZ Custom Shop with action work already done and, have it shipped to an FFL in your area, and you'll probably never have to tweak it again. Or you can with CAJUN GUN WORKS, to get some after-market parts, do it yourself, or have CGW do the work. Either way you'll end up with a superior gun that will probably not need anything in the future.
WWW.CAJUNGUNWORKS.COM)
The Witness line offers some pretty nice SA guns, too -- same basic gun (i.e., the CZ pattern) but little true interchangeability of parts. Then too, some of the Turkish-made gusn (also built on the CZ pattern) are pretty nice. The big advantage of the CZ is that CZcustomer service is much better. Chances are you won't need to use CS with any of these guns.