not a chicken expert by any means but this is the one that I've been checking into as my "grow up pen" for guinea keets it seems to have more room than most and you could always expand the run area.
Interesting how they photograph them to look much larger than they are. The "Coop" part it 2' x 2' x 1' or pretty darn small. Roost bar is on the same level as the nest box so they will probably spend as much time pooping in the nest box as the "coop".
JT