These crates are massive! Heavy duty for sure. The wheels feature is the best part. The plastic tray is designed to go under the wire bottom which is not very comfortable for the dog. My dogs like to move the bed inside when it’s hot so I just dropped the tray in from the top door. I wish that this crate was available smaller. I have 2 of these and am having trouble finding a place to put them in the house. We just got new carpet and realized how gross it was under where they were previously. Haha. They have been banished to the tile.