The Walther CCP is one of those guns that was not properly beta-tested and thus had some issues when it first came out. It didn't help that later on Walther had to do a recall. The initial disgruntled owners and people who dislike Umarex complained far and wide creating a near urban legend level of negativity toward the CCP. The Walther forum became a magnet for those who wanted to complain even more, even to the degree where people who didn't even own a CCP went there to parrot complaints. Generally speaking people only seek out gun specific forums because they are hardcore fans, have specific questions, or because they are having troubles. None of those groups really represents the average experience. The lack of aftermarket support, especially sights, until recently did not help the CCP either.
I do not have a CCP but I have rented the same one a half dozen times at a local range and intend to pick one up. The rental gun has a few thousand rounds through it and runs like a champ. Has reportedly never had any issues and definitely hasn't the 600 or so rounds I have put through it. It fits my large hands much better than the Shield, G43, PPS M2, CW9, LC9S, etc. I don't care for the manual safety but like on the Shield it does not interfere with my grip or shooting style either. The two local gun shops that sell them have sold quite a few and reported only a few disgruntled buyers early on but none since then. Later production and post-recall guns are not having the same issues as the early production guns, other than being very dirt and apparently hot with extended shooting. There are many satisfied owners of the CCP and they seem to be fairly popular, outside of the internet anyway.