Many Walther owners love their P99s with an almost religious fervor.
On the other hand, when I was shooting IDPA more frequently, there was a flurry of P99s that showed up shortly after the pistol was introduced - the adjustable backstraps made the guns comfortable for everyone.
But then a strange thing happened . . . over about a year, the P99s gradually disappeared. Seems that many exhibited reliability problems, and Walther, with stereotypical Teutonic arrogance, dismissed the complaints.
In some cases they told the people that different ammo - commercial, over the counter stuff, nothing exotic - required different recoil springs.
A friend - an IDF veteran - found that the pistol could only go a couple of hundred rounds (WWB ammo) between cleanings, or reliability declined.
My personal observations are hard to reconcile with the enthusiasm some people on the gun boards have for their own P99s, so I suspect that quality control is spotty . . . maybe the Monday morning and Friday afternoon guns are the ones with problems?
One thing . . . based on the company's past history, once Walther introduces a "P100" and discontinues the P99, you can expect factory support and spare parts to dry up promptly.