Just got my G70 and am testing it at home before taking it out. I had a G50 and experienced some serious drop out issues on large stages -- to the point where I had to turn the transmitter off and on again to reconnect to the receiver. I'm trying the G70 to see if I have a different experience, and have had a few problems.
I've used the scan feature to pick an interference-free channel, but still get some widely-spaced (in time) drop outs, sometimes as long as a second or so. I have wifi in the house, but nothing else in the 2.4GHz range. I am standing no more than 5 feet from the receiver and it is not buried between higher pedals in the board. I placed the transmitter on my belt, slightly behind the guitar.
Absent the slightly glitchy behavior, the sound is excellent. Amazing, even.
I'm interested in any else's experiences.