I bought four of these and they are great for the price, good quality and easy to assemble.  Some have noted that you need to predrill holes to screw the seats to the base but you don't need to do that (at least not if you have a screw gun).  I just put the seat upside down on the back of my couch, placed the chair on top of it and made sure the were aligned, then just screwed the four wood screws into the bottom of the seat.  Took about a minute per chair.

The downsides are:
* The seats don't swivel as smoothly as I'd like but they aren't bad.  Just a little stiffer than I'd prefer.
* I was missing two of the bolts used to attach the seat to the legs for one of the chairs so I needed to get replacements at the hardware store (you can call and have them mail replacements but I didn't want to wait).