I use the GQF cages. They're a similar concept. They claim 4 quail per section. My max is 3 hens.
There are 3 sections per tier/cage. I removed some center section dividers to make some compartments bigger, so I can have 4 or 5 hens with a roo.
I used to have an aviary and really liked it, but it was a lot of work. Dealing with the poop balls on the birds feed was getting to be a pain. I moved and got rid of the aviary, and went with the GQF cages. Wow did my life get easier. No more poop balls that result in foot spa treatments. Cleaning is a breeze, and the eggs are always clean.