Yes, I have one myself, in 9mm. Just the name Walther should say a lot. I originally bought it for my wife because I thought if it fit her hand and if she liked it she would shoot. Boy was I wrong.
But in looking at it more closely and doing some shooting drills with it I was impressed. Accurate and it went bang every time, also it had nothing to hang itself with if drawing from concealment. And yes it is more concealable and more comfortable (in my opinion) than a Glock,Sig, and especially the Ruger (yes I had one of those too). And if you've had that Ruger any length of time you're going to feel spoiled with the Walther. Yea its a big step up. One of the best options is being able to carry it in either DA or SA.
One thing to point out to you is is that the recoil spring in this pistol is quite heavy and on average it takes about 500rds to break it in. Initially it's recommended that you use 124gr bullets or larger in order to funtion properly and break the recoil spring in. After 500rds you can switch to WWB 115gr for practice. If you do it before that you'll get FTE's. Not enough heinie to get itself out. I was lucky enough to have one that would just, and I mean just kick the brass out but not lock the slide back. Doe's fine now.
Well thats all for now if any more questions give me a shout,
Vern.