THE BEST INVESTMENT EVER!  The kittens LOVE it!!!  I placed a bunch of little toys all over it and they just play and play and play.  I am concerned if it will be stable enough when they get a bit older.  The base of it really should be a few inches larger.  It was relatively easy to put together.  I wish there was a place to post pictures.  For now, I give it FIVE PAWS UP! :)