I didnt get the pictured crate. The crate I got has double doors on the long side and is steel grey. So far it is serving the purpose.

Couldn't chew thru metal wallsfloor but made quick work of wire door. Going to take to a sheet metal place to try and fix and modify door so there is nothing to get teeth into. Right now bricking her in with cinder blocks.

A solid construction crate comes with a plastic tray so that dog does not have to stand on grate. Stacks well, but in an earthquake are you would want to secure the modules. Instructions for assembly are clear, the screws need to enter at an angle and then straighten out, plan to spend some time on assembly.