I'd have to go with Jennings, and Bryco Jennings.
I had a bryco jennings nine that cut the heck out of my hand, had to redesign the sear to even make it work, it had a pin that would work loose after about a mag or so.
also would go back togeather three different ways, two of which didn't allow it to function.
I hate to defend the raven, but I got ahold of one of there stainless .25s a while back, the firing pin was broken, so it was almost a free gun. took it to the lathe, and inserted a piece of drill stock to replace the broken part, gave it to a budy and he's had nothing but nice things to say about it since. stainless actually had some decent tolerences and weight behind it.
I also have to step to defend intratec, yeah alot of there stuff was crap from the factory, but most of it can be fixed with a little love, and they can be wicked fun, its just a toy, not a serious weapon.