Pros - Slick feel, great tone, including clear root notes and crystal clear harmonics. Super quality German manufacturing. Seem to have a slight lower tension, than other coated roundwounds.
Cons - None.... except they are pricey.
But considering the longevity, may be better than any other coated strings.
Been seeing these for a while. And with the higher cost, been a little reluctant to purchase. Boy was that a waste of time.
I've been using DR coated strings and Roto Nexus Coated strings for years. Once I put a set of Optima Gold Uniques onto my baby, I've ordered sets for my other main basses. And a much slicker feel than the other coated strings.
Tone is much cleaner, with great lows and root tones and super harmonics. Really a string for most any type of player or music category. And with super long life (as the coating doesn't chip off like coated strings) the price becomes a non-issue.