I do. I played a Carruthers EUB briefly years ago in college but my real intro came about six years ago when I was playing in a salsa band and decided to get my own. I bought a used NS WAV off Ebay. It showed up on a Tuesday and that Saturday, after a crash course with my old Evolving Bassist book (Rufus Reid), I played a four hour gig on it. My tips were killing me but I survived. It's not rocket science. Sure, it's different. You play it vertically, not horizontally, but it really isn't as different as a lot of people make it out to be. My gear works fine for either but my taste in electric amplification has always skewed towards DB oriented gear (Polytone, Walter Woods, etc). I played salsa and jazz on it for a couple of years but kept missing out on gigs because I didn't play a "real" bass so I did a rent-to-own deal at Lemur Music for one of their house basses. I love playing it but usually only play it at home or on paying gigs since it's too much of a PITA to schlep to rehearsals. My arco chops are not super strong but they have gotten me through a couple of arco-heavy musicals. It *does* require a good ear and you do need to play it regularly. It's a very difficult instrument to play well "off the couch".