I couldn't believe the price on this dog pen, but the reviews were good so I took a chance.  It arrived quickly and in a smaller than expected package.  It folds up to an amazingly small size and pops up easily into a sturdy dog pen.  I'm planning to use this for my elderly dog who is not 100% reliable in her potty habits during the work day.  She has arthritis, so I wanted something that she could have a bed and her food dishes in, but still be able to move around comfortably so she doesn't get stiff.  

This is perfect.  I'm thinking of getting a larger dog and will give up my wire crate that folds for one of these in a larger size, instead!

Probably not for chewers, but otherwise great for indoor or outdoor use!