I am considering getting another ccw along with my Glock model 27. I am sold on the 40 caliber but just want a thinner single stack weapon. I have been reading about Kahr a lot but the Polymer series reliability seem to be spotty. I just about put down a deposit on an MK 40 today but started reading about the Walther PPS being even thinner than the Kahr. Reliability is the most important thing with me and size being next. How is the reliability of the PPS in 40 cal. ? Do they offer it with night sights yet? What are the downsides to the Walther? I really like the magazine release idea, looks fool proof to me. Any opinions will be greatly appreciated.