The one I got from VapinArt has been flawless.Based on DPL's thread, the clownsticks seem to be working just as well as the original!!!!
Unfortunately though, it appears those might be exceptions. I usually avoid being an early adopter, but I deviated with the Xvo. I won't (deviate) again.
I wish I didn't LOVE the damn thing so much though. Difficult to put down when they're working perfectly.