jahwarrior, I have been considering the PF-9 as well, so I spent some time over on KTOG.org. I recommend visiting that site. After asking some questions, one of the members who lives close to me offered to let me shoot it at the range. The short review is this... I am now more confident in my plan to purchase one.
It is a very small, but nicely built piece. It is noticably larger than the P3AT and it does not have the toy-like feel of its tiny sibling. To address your questions....
Shooting it: Many KTOG members have complained of sharp edges that wear on your hand after a few dozen rounds. KTOG has a how-to for sanding all these rough spots off the grip/trigger. It has a small grip, as you'd expect. If you have fat fingers, you are likely to only fit 2 fingers under the trigger guard (even with the mag extension). I have kinda thin fingers, so I can just barely fit all three fingers under the trigger guard (again, with the mag extension). With regular loads, the little 9mm has a sharper kick than my full-size M&P40. When shooting +P, the recoil is downright harsh. Accuracy is not bad for a gun of its size, but it will never be a fun range gun. Its accuracy is suitable for its intended purpose - close and personal defense. The trigger is just ok; much better than that of the P-11. Again, it is suitable for its intended purpose. If I am defending my life, I will be squeezing the hell out of the trigger, not analyzing the takeup. The trigger does not allow for a short reset; it must be released completely. This has cause failures from some KTOG members in follow-up shots. With such a light weight gun, limp-wristing could also become a problem. The sites on the PF-9 are quite usable for their size - they are made of plastic.
Caring for it:
The gun does not like dirt or the heavy packing lube it ships with. Clean it thoroughly when it is new, and often thereafter. It is a "limited use" gun. From what I have read, Kel-tec suggests its life to be about 6000 rounds. Use it enough to keep familiar with it - again, it is not a range gun. From the Kel-tec website: "the PF-9 will accept +P ammunition, however, not with continuous use".
From reading the KTOG site, it sounds like the gun has become very reliable with the recent updates. It is true that I would probably opt for the Rohrbaugh if money were not an option. However, for the price of the two guns, the Kel-tec seems like the better value.
id take a look at the kahr pm9 if i were you. its only .02 of an inch wider and 1 oz heavier than the keltec pf9.
The advertised width on Kahr's site does not include the slide stop. The difference in slide widths may be 0.02", but the total width difference is 0.1". With the guns side by side (a picture I saw), the PF-9 is noticably thinner. The attached chart compiles data from owner's, as well as advertised numbers.
Best of luck.