Cats LOVE it!  They use it constantly and it still looks like new after 5 months.  They can stretch out when they scratch and I think that's what they like best about it.  At first I thought it was a little wobbly but it has never tipped over or even moved when they use it.  Will buy another if this one ever wears out.  Strongly recommend.  I have 4 cats so it gets a workout!

Pros: Excellent quality 
Cons: None