I've run 2 Avalon6s for quite a while now.
After Avalon sent them to me, I suggested having a competition.
They agreed - but it was my idea to have another competition.

I have limited power at home, and 10Amp power leads on 240V means 2400W down to my garage = 2 Avalon6s
Power and limits works well ~7THs under 2400W

There's no way in hell I'd run an S7 (or S5) anywhere but the garage - they make WAY too much noise.
But they also don't fit well in to a 2400W limit.

My electricity is priced such that I can mine, but not during peak when it's ~40c/kWhr
I switch the Avalon6s off at 2pm each day and back on at 8pm each night.
Never had a single problem with them doing that (switching on and off) or mining on the pool (during restarts) ... and I'm a long way away from the pool