Don't do it!!
We bought one very similar to this. Said it was good for 6-8+ chickens. NO WAY!!!! Maybe 2-3, but absolutely no more than 3.
There is not enough ventilation. My husband had to add vents. Very difficult to clean. The slide out tray sounds like a good idea, but is really a pain in the backside!
No place to hang water, so we put a waterer up on a brick and the chckens kept knocking it over and soaking the bedding! PAIN, PAIN, PAIN!!!
The good thing about this coop is that we had to research and design our our coop. We built a deluxe coop and our girls are so happy to be out of that slum!
Don't do it!!!