Sturdy and my cat loves it
My 1 1/2 year old cat really enjoys this.  He gets a full stretch in as he scratches.  He even uses this instead of the back of my leather couch (most of the time).  It is sturdy and well made.  I did have trouble getting the last screw in the bottom to be flush with the base, so mine wobbles a little.  Someone with better than my (newborn kitten) grip strength should not have this problem.  Not cheap, but worth it.
Rating: 5 stars