Lower tension and thinner than most bass strings but that's why I bought them, I don't play as much as I used to and find that with these strings I can play for much longer without getting tired.
Due to the low tension they can easily be tuned up to solo pitch without stressing an instrument. In fact they feel more like standard tension strings this way and work very well, sounding nicer and less raspy than most solo sets I've tried.
Tone wise they were pretty bright at first but mellowed out after a week or so, the higher range carries well but the lower two strings can lack a little richness of tone. They are clear and articulate though and very easy to get notes started on. In my opinion any slight deficiency in tone is more than made up for by how ridiculously easy they are to play.
Have done a few gigs with them now and quality seems fine, can't see them coming of my bass in the next year or so.