I have also been carrying my CS40 quite a good bit lately and agree with you in a lot of aspects. The only two challenges I've had with mine has been a sticky plastic guide rod in which the detent did not hold in the takedown lever. Sometime it would take a few adjustments to make the detent functional allowing the take down lever to stay in place and not bind up the slide.

I ordered a new guide rod and the problem rarely shows its head anymore. The other qualm I have is the plastic sights. I will most likely spring for some trijicons or big dot XS sights after Christmas. Have you upgraded your sights?

SVT28