they all rock due to uneven legs.  the backs of the chairs are not as high/tall as they look in the picture.  in the picture there is about 2 inches of chair above the counter.  the reality is that they can slide beneath the counter all the way.  Also the legs are not the same wood color as shown in the picture.  they are much darker.  they are fairly comfortable however due to the lower back than shown we cannot lean back in them and relax/recline at the table.  fairly easy to assemble by one person.  after sitting on them for a couple months they are wobbling so I will have to tighten the bolts again... thought about returning them but don't feel like searching for their replacement.