We just got these and my husband wasn't home, so me and my 11 yr. old daughter and 13 yr. old son assembled.  Mostly not too difficult to assemble BUT, one chair had to be filed down with a wood file because it wasn't cut right.  Another tip is do NOT tighten the screws too tight as you can crack the wood - yes I did this on one of the stools, hopefully it won't collapse  under a heavier person's weight.  

Pros: Great value - fairly easy to assemble, price
Cons: Assembly required, no tips on DO NOT OVERTIGHTEN!