I was initially attracted to the style of this as I was so tired of chunky cat furniture covered in carpet.  I was hoping the cats would take to it, and they did.  They are happy climbing and scratching and I am happy with the way it fits in the room.  It was incredibly easy to assemble and is very sturdy once you have it together.

Pros: Easy assembly.  Sturdy.  Attractive.  Cats use it.
Cons: The only con was the original price, but the sale price made it manageable.