I bought these strings for a studio session of my rock band. I've tried plenty of strings during 18 years of playing the bass (steel, nickel, flatwound, roundwound, coated, etc.) but these are my new favorite.
During recent years I've changed back and forth between DR hi-beams and lo-riders, but there is a slight disadvantage with them when they are new. For my preference, the hi-beams have too much high-end and the low-riders lack a little bit of mid-range.
The Pure blues nickel string has a nice amount of lo-mids and higher low-end (it doesn't feel too bassy but punches thru really well), and when you play from little bit higher the clarity of the high-end is just perfect. Listening to our last recordings, there is a clear difference in how the bass comes thru the mix.
They also say that nickel is nicer for your fingers, which you can notice when you slide your left hand along the strings. They don't dig in so much. With strings the wearing is always a problem, and i haven't noticed any real difference with these strings and other quality strings.
But anyway, you should check out DR's website, where they have sound samples and decide for your self!