Just got my two Ant's from B6 today.

After running for 4.5 hours here's what they're doing.

Ant1 running at 439.18 average (218.75 freq)
Ant2 running at 440.74 average (218.75 freq)

The only issues I had was with them initially turning on. It took 5-6 power cycles to get them to turn on, not sure why. After setting up the first one and changing the IP, had to do it all over again with both units to get them both up and running. I was worried for a bit there that they wouldn't turn on at all.