This playpen is AWESOME!!  Now I can let my two cats enjoy the fresh air and sunshine without worrying about them!  I also have added the Mittens Cat Tree inside for additional activity and lounging options.  They love it!  It is well made and was fairly easy for my son and his father-in-law to put together.  
It is quite heavy though, so be sure you know where you want it to be as moving it could be difficult.  
Once again, Wayfair had just what I needed!!!