Well made. Folds flat. Tray is removable flat. Only drawback is tray has a small lip so some cats may spray outside the the playpen. This crate has a much taller tray but it is not removable. You have to lift the wire structure off of it.  That is fine in some cases but if you have dogs in the house they could knock the wire structure off the base.  In such cases this manufacturer is the better choice. Additional covers are available for the shelves.  You can also hang Closet Maid type wire rack organizer stuff off the playpen to make it more interesting or useful to your cats.