This was fairly easy to set up and my cats love it!!  I put it in the living room in front of a window and they love to lay on it looking out the window and napping.  The only problem we had with it is the round part on the middle level.  It is really soft and is my younger cat's favorite place to nap but several time we have had to put in stronger nails to hold the edging in place.  Other than that we have had no problems.