We've had these stools at our kitchen counter bar for about a year.  They are very sturdy and surprisingly comfortable.  My teenagers give them a pretty tough workout swiveling them around and adjusting them up and down and they are standing up perfectly.  They are a great bargain that you'll get a lot of compliments on.   

Pros: Great value, easy assembly, easy to clean, look great
Cons: The round piece at the bottom is not metal but still works well