I was seriously considering the brain, but decided against it. At the time I didn't think I was going to ever use lipos, but 6 months later, bought some. I tend to agree that it's probably fine as long as one watches the batteries closely while charging, which is supposed to be done with lipos anyway. My accucycle actually rarely makes it to the field. Most of my planes have oversized rx packs, I've got a spare tx pack, and I usually bring more than one plane. I've yet to stop flying early due to a low battery.