It's a great space for a dog as long as the dog isn't a stressor!  Don't even think about zipping the door closed if you have a dog that has anxiety.  They will go through the screen in a nano-second.  Mine also ripped on two sides along the zipper line so I bought high strength thread and hand sewed it and it's back to being functional.  I've spent less on hard plastic kennels that last forever and I paid about 40 bucks more for this one that looks awesome and is really only for a calm, relaxed dog that has no anxiety issues.  If you leave the door open 24/7, anxious dogs likely wouldn't destroy it because they can come in and out on their own.