I absolutely positively hate them....lol I would never buy another, and no they don't help with poop. Actually they roost on the top and poop more I think...lol Filling them is a pain because the top is so much higher than the bottom. Hard to explain. If you just fill the bottom portion the food is low in the feeder. If you fill it enough that it comes up to the holes it makes a mess before you can close it. This one sits outside all the time, I don't normally use it, but I needed something for out there. I hate the big round one that I have in the coop, but it's better and they don't poop in it.
That's good.
Yes
Depends on the temps inside or where your brooder is. I brood inside and if it's spring/summer, (which I will never brood inside for winter again, so you can say I won't hatch in winter,) usually by 4 weeks for me it's off. Between 3-4 weeks if it's warm enough inside I cut the light during the day and only use it at night when it's cooler.
Me too pretty much.
WV posted an excellent pic of draw down. You'll know it when you see it cause you'll think holy crap that air cell is big! lol