I had two Tomcats -- among the first.
Great shooting guns, very accurate. Rough triggers that eventually smoothed out (at about 1000 rounds).
The only problem was that they broke a lot. Firing pins were especially troublesome -- broke several, even though I never dry fired and used snap caps. Also broke a trigger spring. And if you're not careful when you clean it (as in taking off the grips), the safety can fly loose and a tiny little spring will quickly make itself invisible.
Then too, the firing pin strikes sooooo hard, it quickly eats up a snap cap, and you have to replace them frequently. That's not cheap.
Most gunsmiths won't do a trigger job on them, 'cause they're small and very difficult to work on. (They can't charge what they need to charge for the work they do, so they just avoide the problem if they can.)
Mine was sent back to the factory a few months after I got it, with a broken firing pin, and they kept it for several months (this was during the early production stages, and they didn't have replacements in stock) -- then sent me a new one. Had it about two weeks before the trigger spring broke.l
I personally know of 5 that failed in one way or another, including frame cracks. But these were all the early models.
If you're not careful, its real easy to accidentally nudge the barrel release and the barrel will pop up and possibly get off track.
The last time I fired mine, I was shooting at the range, and something happened, and the slide locked back, off track. I had to use a nylon mallet to get it moved forward. It looked okay and functioned fine. I sold it and got a Kel-Tec P-11. Not much bigger, not a lot heavier, but it held 10 rounds of 9mm.
The new ones may be a lot better than the early ones, but if I were buying a "mousegun" now, I'd get the Kel-Tec P-32. The Tomcat is a LOT BIGGER than it needs to be to do the job it was designed to do.