My experience with Tomcats wasn't good. I had problems with two of them, and personally know of 6 others that had problems, including frame failures. The gun range/shop where I shoot quit selling them because of all the problems they had: sell it, and a week later have to send it back to the factory.
(After I sent my first one back to the factory, it took them three months to get a NEW gun back to me. That one went back the factory twice with broken firing pins. Even snap caps won't keep them from disintegrating.)
The last time I shot mine, the slide jammed back, and I had to use a nylon mallot to free it up. There was no damage, but I totally lost confidence in it -- and I bought it for concealed carry.
The only guy I know who has one who hasn't had problems, is a guy who doesn't shoot his.
He bought it, fired it at the range once, and stuck it in a drawer at home. He sometimes carries it.
Perhaps the newer ones have all of the early problems resolved.
There's no question that the Kel-Tec is a better gun, if for no other reason that its a locked-breech design that will accept +P ammo.
The Tomcat is heavy, and wide, and if you're not careful, when reloading, you can knock the slide off the frame by pressing the tilt lever a little too strongly.
On the other hand, both of mine were very accurate, and while shooting wasn't always pleasant, they were far more pleasant to shoot than a Seecamp. (I have never understood the mystique of Seecamps: they hurt the shooter almost as bad as the target!)
Someone asked how I shipped it back. That was over two years ago, when there wasn't problems with UPS. I sent it by UPS in the factory box... Insured for $300, hoping it would get lost.
I traded it in on a Kel-Tec P11, and I've never looked back. I have 12 other handguns, including several very expensive ones (like a SIG P-210) but the P-11 is the one I usually carry. [I have a concealed carry permit].
If you're looking for a small gun, the Kel-Tec P32 is probably the best thing going. If you want a slightly larger one, with 10 rounds of 9mm, then the Kel-Tec P11 is a good alternative. As is the Kahr Micro 9mm. The Kahr is heavy. Maybe their new polymer framed 9mm will be lighter.