I had one. Curious about all the buzz, also much appreciate the Hermida reverb pedal. The Zendrive didn't really work well for me. I never need much more than good clean boost, supplied at my house by the TIM pedal. So the zendrive had some nice sounds, but they weren't too useful to me.
It's no reflection on that pedal. Can't tell you how many other ODs I have tried and passed along for the same reason.
MD