Works well. You have to slightly modify the bridge to get the pickup to fit. I used it at only one gig so far, but it worked well and much easier on stage than a mic. The plug is a bit tight, but that's probably a good thing on stage. I'm able to tuck the tail under the chinrest when I play acoustic.
Not sure how great the tone is or is not. Jury still out on that, but so far I am quite pleased.