Reloads :
On the Walther PPS M1 it does require somewhat of a mental switch in order to do reloads and it's generally a good idea to train with it exclusively for awhile. I grew up with pistols push button mag releases and I've done all my formal training on pistols with a push button mag release rather than that European style mag release that's mounted on the trigger guard, so that mag release is a bit counter-intuitive. At least it was for me when I first got it. The more you shoot it and the more reloads you do the better you'll run it (Big surprise there I know).
The Walther PPS M2 9mm that I bought had an issue of ejecting the mag all the way or popping it out just enough where it wouldn't pick up another rd. The mag spring on it seemed incredibly weak as well. I sent it off to Walther and they repaired it confirming that there was an issue. After I got it back though I trained with it for awhile, but with my thumbs forward style of shooting the mag release on the M2 was right under my thumb and I would sometimes eject the mag accidentally. Tried to get past it, but couldn't and sold it.
The PPS M1 isn't going anywhere though.
Grips :
For '
grips' (hard for me to call stickers on polymer grips, but I guess that's what they are) on the Walther PPS I went with the Talon rubber style rather than the granulate. I pocket carry it and drawing it out of a pocket with granulate grips it hangs up a bit as it grates on the pocket. Gripping it with the rubber sticker type grips it feels a little more positive and not quite as slick.
https://www.amazon.com/Talon-Grip-W... rubber type sticker grips (*Click for link*)
Sights :
The sights on the M1 do have a bit of air in them with gaps on either side, but it hasn't affected my accuracy within 15 yards. The view in this particular pic makes the gaps seem huge, but it's not this bad in person. There are just slight gaps on either side.
The XDs's sights are slightly better, but I still prefer the Walther PPS M1. Personally I don't like three-dot sights anyway. I prefer a front sight to be highly visible with a stripe on the rear, so to me it's not a deal breaker to automatically buy new sights as I typically change them out anyway.
So at some point I intend on replacing the sights on my PPS M1. Prolly a XS Big Dot or a set of 10-8's.
http://www.xssights.com/Detail.aspx?PROD=993883&CAT=8382
http://www.10-8performance.com/walther-ppq-front-sight/
http://www.10-8performance.com/walther-ppq-rear-sight/