Installed these on my JB-75MN NA Vintage Series. So far the sound is ok. Not as good as my normal brands, I use 2 different brands depending on top strung or through body and desired sound.
The good:
Have a great feel, nice and smooth.
Appear to be easy to fret and not too fatiguing.
Sound so far is decent, not as good as some of the big brand names, but only have a few hours on them. Perhaps they will sound better with more hours.
The not so good :
Sound is more anemic than other brands, but as mentioned still breaking them in.
Can't comment on longevity etc as of yet.
I purchased these out of curiosity, hopefully will be pleasantly surprised. So far they seems promising.