Been using the pp for 3 years or so with no issues. Melted one or 2, but that was about all the problems I had. They are much more user friendly for hot swapping than the ss ones which are too hot to quickly swap if you need to. I have replaced some of the ones on my bk and other high strain areas with ss, but never had one break while brewing. The nice thing about the pp ones is both the the 1/2" and 3/4" sizes have the 3/4" camlock size connection so you can save some adapters and connect core components with one size camlock.