I'm shot virtually every plastic gun on the market (a lot through Glocks and M&Ps) and if I were going to shoot another plastic gun again, it would be a P09. In my opinion they are excellent.
-Mine is crazy accurate.
-Trigger isn't horrible out of the box, and from what I understand can be made race-ready via CGW
-Felt recoil... I shot it back to back with my old M&P 5" (competition gun that I shot for two years... so I'm very familiar with it), same ammo, same day... the P09 just recoils less and tracks flatter. And as mentioned, shoots a group much smaller.
-Factory stippling is perfection as far as I'm concerned
-Even the stock sights are semi-workable, but aftermarket is available there too.
You can have a great trigger, light weight, and very accurate, plenty of aftermarket support... I think it is a tremendous pistol.
I got a P07 gen 2 for carry; it isn't as crazy accurate as my P09, but all the other good stuff is there. I like it too.