I have a Do-all, DON'T WASTE YOUR MONEY. Nice idea, nice price, but its a piece of crap. I bought one 4 years ago, and to Do-all's credit they've replaced it 3 times under warranty, but I've given up on it. It eats batteries, and the motor takes a crap often. I have 3 of the Do-all Professional 3/4 cock seated throwers, and love them, but they should have built the automatic a little better, then they might have had something.
I can however, strongly recommend an Atlas AT-50 - this thing rocks! Great battery life, throws a consistent bird, never breaks down. When you put the 2 side by side, you can see the difference. I'm probably going for the turret model next - the AT-250.