I have them - the heated brooder on top and two unheated grow outs underneath. I have a 50 chick ecoglow in the middle one for a middle step. I LOVE it. I went back and bought the 5 stack quail unit for my quail pens.
Of course, the shipping is as much as the units. - ETA - of course I'm in CA and they are in GA (I think).
Putting it together is a nightmare..................a million screws and parts and limited instructions. It's one of those manuals that is mostly pictures and not too much English.
I forgot about the assembly. Yeah it was kind of a nightmare. So was taking it apart. Thank god for electric screw drivers!