Just not my thing. . .
I tried a set of these just to see and play them for myself. I'm a fingerstyle player who uses a pick for single lines when the music calls for it, and the JP 600 set is my favorite, as it's so versatile for what I do. These seem more appropriate for those who strum a lot, or want a quiet and intimate fingerstyle touch on a parlor or other small-bodied guitar like an 0 or 00-style.
ProsBelow--I'd recommend them to a friend who is more of a strummer.
ConsSoft, quiet feel and sound that is not what I need for my style of playing. Basses are much quieter than the trebles.