I've had one of these for just under three years and it's the gun I shoot the most. It ROCKS! I shoot in a smallbore pistol league pretty much each week, and I've never had a jam or failure to fire. It is an EXTREMELY accurate pistol, on par with some high dollar european guns. The trigger length of pull, weight and break are all adjustable without taking the gun apart (well, you have to take the grips off for one adjustment, but not the others).
The best thing about the IZM 35M is that the axis of the bore is extremely low to the hand, almost eliminating muzzle flip. It's amazing how well this works. For timed and rapid fire, this really helps. Also, the magazines actually take 6 rounds. Also, you could chamber a round and then insert a fully loaded 5 rounder.
Parts aren't a problem, the gun is currently imported by EAA. Also, the gun comes with a complete change of springs (which I haven't needed), a punch, firing pin and some other parts that escape memory.
The only issue I've had with the pistol is when I first got it my grip wouldn't fully depress the grip safety (required for importation). I had a heck of a time figuring out to move my hand up 1/16 of an inch. While initially annoying, I haven't noticed it since the first day I got it. Besides, the grip safety just reinforces good grip stance.
The grips on the gun are obviously not high dollar custom grips usually associated with target pistols like these. Since they wrap around the hand, be prepared to get out a file and fit it to your hand. It's deliberately made oversize so that normal American adult hands have enough wood to play with in this respect.
When I got this pistol, I stopped shooting my Ruger Mk II bull barrel with a Volquartsen trigger and grips. My scores went up 15 points. I can't say enough good things about this gun for its price point.
-John C