On 11/6/14 I adopted Dancer (a male 8 month old kitten) from the ASPCA.  Dancer is a very active kitty.  This kitty condo is just what I was looking for.  Dancer loves to play on it and uses the sisal columns to manicure his claws (great for the furniture).  He loves the hanging ball on the top tier and likes to go into the bottom hideout.  Dancer climbs all over it.  It's well constructed and doesn't take too much room.  Dancer plays hard and it's holding up well.  I recommend buying this kitty condo.  It came quickly.  The kitty condo and the box came in good condition.  

Pros: Assembly was easy to do and no tools are needed.