Here's my review from back when she bought it:
A woman friend (Cynthia) and I have been looking for a 9x19 for her for some time. She's tried out a pile of them and handled dozens of them. This week she decided that the Walther PPS was for her - she liked the trigger pull, the size and feel of the gun, the fact that it had two different backstraps, the fact that S&W services it and has good customer service, the fact that German-made Walthers are generally reliable, the easy takedown and manual of arms, and just the way the slim gun fit her.
We took it out to the range today and put about 200 various rounds through it. The gun performed perfectly when clean, but required a quick wipe-down and relubing about every 100 rounds.
The problem that would start to show up was that the slide wouldn't go fully into battery, hanging up just a teensy bit from closed. A slight touch on the rear of the slide would lock it into battery, but that's a sign that the gun wants to be torn down and cleaned. Tearing the gun down (very simple, just like a Glock) revealed that the insides were pretty dirty and gritty - not so much a function of the ammo as the tightness of the internals. A quick wipedown and re-lube got it back into action.
The trigger is quite good on this gun. I've heard people complain about the PPS triggers, but I found it far crisper and somewhat lighter than that on the stock Glocks. Reset was short and definitive. The gun was accurate: I was able to shoot various ammos into mostly touching groups at 10 yards off hand time and again. The gun was much easier to shoot with the finger-rest magazine than with the more concealable one with the flat floorplate. Cynthia started out thinking that the bigger backstrap suited her better, but switched to the smaller one (just to try it) midway through her range session and found it worked much better for her. FWIW, I found the smaller backstrap gave ME better performance as well - I could get a better grasp on the thing.
Velocities from the 3.2" barrel were higher than I would have expected. I didn't chrono everything, but here are a few:
American Eagle 115-gr FMJ M 1170/ES 14.00/SD 6.24
WWB 115-gr FMJ: M 1108/ES 25.85/SD 10.86
Winchester RA9TA 127-gr +P+ Talon JHPs: M 1223/ES 28.65/SD 11.66
Win USA Personal Protection 147-gr JHP: M 913.3/ES 36.35/SD 17.05
Speer Gold Dot short barrel 124-gr JHP +P: M 1158 fps/ES and SD lost
She'll be carrying the short barrel Speer load, FWIW. I was impressed by the minimal deviations that all loads seemed to display through this precisely fitted gun. A couple of friends shot it as well and seemed to like it and do well with it also. The striker left good, solid whacks on the primers - I compared them to the hammer/pin-struck primers I shot through the Star BM and could discern no difference.
Cynthia's groups got a lot tighter throughout the afternoon, and her flinch from last time went away entirely. This gun requires some consideration to shoot well, as it's not real large and it's quite light (about 20 ounces). We had cleaned the gun before shooting, and we went back and cleaned it again afterward. Last thing she did before I left was load it up for business . . .
Not bad! I'd buy one. I have to say that I like the feel and trigger pull of this PPS better than that of any Glock I've used (and I've been playing with them for more than 20 years and have owned all kinds of different ones). I was surprised, to be honest, to find that the PPS worked so well for me. My across-the-street neighbor's son is always talking his up, but I was just never that impressed with the looks and feel of the PPSs that I handled in the store, though I did admit that their triggers were okay. Shooting it made quite an impression on me.