I have a P11 and love it. My first and only pistol.
I fluffed and buffed it inside and out, which is also cool because I learned the inner workings...
Added a "White" trigger stop (pencil eraser behind trigger, Sharpied black) that really helps "stage" the shot...makes it a lot more accurate and with more trigger control, IMO, because you can "jerk" the trigger back to the stop, realign the sights, and shoot all in one quick motion. But it did take a while to get the stop just where I wanted it...lots of tweaking.
I also added the trigger shoe, finger extension base-plates to mags, and am planning on turning my 10 round mags into 12 round mags. And that doesn't even make the mag any bigger...it's perfectly simple, I just haven't gotten around to it. Just need to do some judicious sanding and cutting.
12+1 in that size gun is amazing. You can actually turn it into 13+1 but it makes the mags bigger and costs money (have to order +1 extender from KT).
I just want to replace the sights and it'll be perfect!
Oh yeah...I open carry it in a Sidekick holster, lol. So much for needing a concealable gun. At least it's versatile, and I can conceal it if needed.