There are no "lemons" among Kel-Tecs because they're 100% warrantied, and KT has one of the best customer service departments ever. IOW, if there's a problem, they fix it. The problem is that you may have to suffer through messing around polishing, fitting, testing, etc., to get the perfect P11 you want. I bought a new one last fall, and it was perfect out of the box. However, being a consummate tinkerer and not liking the long heavy trigger typical of DAO pistols, I "smithed" it to my own standards of perfection. And that's just what it is now -- perfect. It's been 100% reliable, and I couldn't be more pleased.
But not everybody would even consider taking on what could be a "work-in-progress" so they may not want to mess with KTs. For a few $hundred more, KT could sell perfectly tuned P-11s, but that's not KT's target market.
The PT-111 has its completely satisfied fans and a few detractors just like any other pistol. Taurus has an even better warranty than KT, if that's possible. If something's wrong, Taurus will pay to have it shipped back to them for repair or replacement, then they pay to have it sent back to you. OTOH, Taurus turns warranty items around in about a month versus 2 weeks for KT.
Kahr also has a great warranty, and for the higher price, you get a better finished pistol. The P-9 is in the same class as the PT-111 and P-11. weight wise. The K-9 and MK-9 are great, but they're all steel and you'll probably become quite aware that you're carrying it after a few hours. Small, but they seem "heavier" than you would think.
I'm just not interested in a compact carry gun that's NOT DAO as these three are, but YMMV. If at all possible, try them all out before buying.