My first (and so far only) handgun was a Kel-Tec P11. Everything I have read says the CPX is basically a copy of the P11.
I dry-fired my p11 a lot (with dummy rounds) before I took it out shooting the first time, so I was quite used to the long, heavy pull. As someone else said, the break is consistent. I was more than satisfied with the accuracy.
I see the P11/CPX as a "working class street self-defense" gun. Not a "fun gun." The heavy trigger means you can get away with carrying it with just a belt clip if you have to. It's not a truly compact gun, so much as a gun at the extreme small end of the full-sized spectrum. It's got a hell of a lot of firepower for the price and size (I use the 12 round mags and keep 1 in the chamber). And yes, they're inexpensive. I have had no feed problems with it, but have had others have feed problems with it, likely due to limp-wristing IMO.
I think it's a great little gun for what it is. Say you have $1k to spend on guns, but you're starting from scratch. You can have a decent AR, with budget RDS and mags, and a 9mm CC gun, if you choose the P11/CPX. Say what you will, but I think value is an overlooked quality in firearms. Spend less money on x, have more money to spend on y.