This is just so awesome.  I have this cat atrium on my front porch.  I can get inside this and clean up done easily if needed.  I have a pet door that opens up in to it from my house.  My indoor cats love it.  Even though they feel cheated somewhat as some of my cats are outdoor cats.  But lost some precious kitties from outdoor incidents.  So we are not taking any more chances.  Need 2 people to put this together.  Easy to move after it is put together, but takes two people to do that.  I would not move it around much, it is not that solid,  I am very pleased I got it.  Wayfair had it cheaper then Home depot.