I bought these strings and put them on a Fender Squier Affinity P-bass and I just couldn't believe the sound I was getting!
Amazing sound. There is nothing else to say about the sound quality. You just cannot compare these strings with normal round wound strings. These strings provides quite a bright, Jazzy sound. But I found them to be excellent for heavy rock and metal as well.
They feel great when you play on them, quite a unique feeling which I believe have helped me to improve my skills!
What else is there so say? There's a reason why Steve Harris, heavy metals probably best bassist ever uses them!