I've never played one, but people who have them seem to swear by them. A scolloped fretboard means that your fingers are not touching the fretboard, which allows you greater speed in plyying, but you have to develop a very light touch for fear of bending the note unintentionally. If you are a shred-head who likes to do big bends as well it would probably be useful, but I'm a bit worried about how it would affect tone for blues and rock playing, seeing as it means you have much less neck wood, and the strings don't get to vibrate on the board itself.