This is the second pen I purchased.  The first I had to return because it turned out to be too big for my needs.  This one is just right.  My dog is having knee surgery and needs to be confined for several weeks while recovering.  I couldn't bear to lock her up in a crate for such a period.  This pen gives her some room to move around--with the necessary limits if I need to leave her home alone.  The return process was relatively painless and the customer service people are without exception, very helpful.