i have both the p40 and lcp.
both are real jumpy. the p40 trigger (and all kahr triggers) is similar in feel to a para ordinance lda, though a bit heavier. overall the gun is kind of a cross between a glock and an lda.
nice and slim, easily concealable. the one universal complaint regarding kahr pistols is the slide stop pin/lever. the edges are pretty sharp. i shoot thumbs forward, and the darn thing would dig in to my thumbs every shot. i had to dremel it down and radius the trailing edge. mine has been very reliable after the first 200 or so rounds. initially it would fail to feed, but no longer.
they are also a pain to disassemble.
i think the lcp is nothing short of fantastic. yes, its only a .380. i carry mine as a backup on duty, and typically carry it as an off duty gun as well.
nothing i have ever handled conceals as well, or is as comfortable to carry iwb. reliable right out of the box. the only malfunctions i have seen with mine were induced by other shooters. one had wrapped his left thumb over the slide, retarding the action, and another didn't fully reset the trigger.
on the down side, the trigger pull and reset are very long. and if you don't fully reset, you will get light strikes.
you need a flathead screwdriver or similar to disassemble, but its still much easier than my p40.