Welcome to the forum. I don't own one now but have had a CW9 and PM9 in the past so I'll give my 2 cents. I think they are good guns in my limited experience. I never had any problems. For a pocket sized 9mm I think the PM9 is excellent and the CW9/P9 being a little larger is good for IWB carry. Range target shooting use only I think there are better choices. Both shot surprisingly well and accurate for me and the smooth but long DA trigger is pretty quick to get used to.
Historically the polymers have had hit or miss issues and most problems seemed to be centered around peening of the barrel hood and spotty reliability. Out of 9mm, 40 and 45 the 9mm's seem to have the best track record and it seems that most of those early problems are a thing of the past. I never had any problems with mine. In hind sight I wish I had not parted with the PM9 as it was great in it's role.
If you have not done so already I would encourage you peruse the archives and older posts under Kahr to see what other members have learned and have to say about them.