I used these on an Epiphone El Capitan 5 fretless, which turned out to be a match made in Heaven. Very smooth, with a truly deep richness. Worked great running direct in acoustic band settings. Note were clear and distinct, even in the low first position. the money tone was around the ninth to 12th feet area. These are probably the best sounding strings I have ever tried on a ABG.
The only issue I had was installing the "B" string, which unraveled during installation. GHS quickly replaced it for me, but use caution when installing these strings.
A side note, the Customer Service Agent at GHS who helped me informed me that these strings (black nylon tapes) are there only GHS labeled string that are not manufactured by GHS.