Honestly, I prefer their Red Label (cheaper) ones!
Probably the first time I try the Black Label strings from Warwick... I must admit I'm a bit disappointed. Yes, the quality of the string IS better than the Red Label I usually use and they're not as aggressive on frets/fingertips but the sound IMHO is worse. No idea how long they'll last, the red label wear out pretty quickly but they also cost a third of these. For some reason I can't find the 30-90 Red Label Stainless but the Black Label are available. Yet, I doubt I'll buy them again, I find them too close to Nickel strings in sound, they have a pretty bad sounding mid frequency voice (at least on my basses). For the money I've found better.