Tried two sets of these strings (black): on a 70s custom P-base style fretless and a Newer Ibanez SR 5-string
Tone: Out of the box they sounded (to me) like premium nickels that were already broken in, slightly muted, smooth highs, detailed mids with good punch and growl, and tight, warm fundamentals. I think these were the brightest sounding coated strings I've heard. After about a dozen sessions there was no perceptable change in sound quality.
And yes... they looked great!
Feel: They have some resistance to sliding, almost sticky/rubbery. On the five string this was, well, ..O.K. but for me (I have a very light touch), definitely not O.K. on the fretless.
I think someone with a heavier hand would not notice this as much.
Bottom line: I will buy these again for a fretted instrument because of the great looks and more than reasonable tone quality.