Ive been wanting to try GHS PF's since I heard that they were the strings that came stock on Stingrays in the 70's. wanting to get that Bernard Edwards thump and snap. The first set I tried on my Classic Stingray broke when I was installing them. I was reluctant to try them again but I'm a flat wound junkie and am always looking for more strings that work for me. Well I just put a new set on my Classic Ray and I love these strings. Very solid bottom and old school thump. They are a lot like my favorite LaBella 760FL's but with a more broken in sound from the start and maybe a slightly higher bit of tension but I have these tuned to E and my LaBellas tuned to Eb. In short i really dig these strings and they are everything I was hoping they would be.