I have a P99 in 9mm...yeah groan all you want...I'm a fan.
I also have nothing but good things to say about it. The controls are, bar-none the most user friendly and functional on any handgun I have ever used. Great pistol on the draw as it is very smooth and with the backstrap options, there is no reason that you cannot find a good fit as far as the grips go. Probably somewhere around 2000 rounds through mine, zero malfunctions.
The only reason that it isn't my go-to is that for whatever reason, my hands/natural point of aim/index finger shoots my Glock 19 better. I am plain and simple, more accurate with it, and with the lighter trigger, I think I prefer its trigger to the Walther. In any case, if you are comfortable with it, it is a fantastic handgun...James Bond couldn't be wrong.