Just did a gig at church, I was about 20 feet away with the receiver sitting up at chest height on my amp and the transmitter hooked to my guitar strap and with nothing in the way, and in a 4 song worship set I had around 30 dropouts. It was HORRIBLE. I wasn't in a place where I could quickly patch into the aux in so I was just screwed. I have done the firmware update on both units and still horrible dropouts. Box is packed up and going to be listed on ebay or gearpage. Very dissapointed with how this went down. It's a really great concept but completely unreliable. I would look back at the receiver and the green light but was blinking insesantly trying to connect to the transmitter. Maybe the Audio Technica wireless system will be better.