Very good if you buy the under $1000 models. I prefer K over SF,RRA, RIA etc. But the more expensive have no increased performance over the base models.
Most of the extra features on the high end K's are bling. Stick to the Custom II, TLE II, CDPII. I have limited experience with the Ultra small K's and won't comment on those. If your wanting a finer 1911 than the base model Kimbers which are quite nice, then pony up to LB, EB, W, or DW.
Most of Kimbers problems can be fixed for the fun of it as your 1911 building skils advance. I like changing sights and replacing the internal parts with Wilson or Ed Brown parts.
Rather than B about all of K's shortcomings, here's what I'm doing to fix them:
I'm rebuilding my K Custom CDP II 5" with:
-Hienie Slant rear sight
-Dawson .090" FO front sight (Kimbers front sight is too thick and slow)
-Wilson Sear
-Wilson Hammer
-Wilson disconnector ( some fitting required for these three, but not hard to do, need a $30 jig and a stone, get the MIM out!)
-Removed series II FP safety from slide and frame
-Wolff 18 lb recoil spring
-polished ramps, throat, guide rod
-stoned trigger hole in frame
-polished trigger bar
-Ed Brown 25lpi main spring housing (required a few swipes off of the frame corners to blend nicely)
-Tripp mags
-Kimber bump grip safety
-Ed Brown large paddle thumb safety
Allmost done, then I'll get her refinished. Starting to feel like a really custom 1911. I also have a 2010 DW V I'm tuning up, all 1911's need to be fitted to thier owners as much as the sear needs fitted to the hammer. melonite should fix most of K's rusting barrel problems, K deosn't use stainless barrels.
Kimber +++:
-Very good appearance
-most parts are very nice
-most MIM parts drop right in, no fitting required should you break them.
-accurate
-decent trigger for a 1911
Kimber ------:
-barrel in white, aka: rust. No stainless barrels
-MIM parts don't respond well to a trigger job, need replacement for pciky shooters like me, but it's not terrible hard or expensive.
-Not a high ride beavertail cut. More muzzel flip than an EB or DW.
-plastic MSH
-poor sights, fat front sight, no ledge on rear sight for racking one handed via holster or belt.
Overall: Great $700-1000 guns. Poor $1500-2000 guns