For a price I would have expected without them, the casters are a nice bonus.  I've bought at least a hundred of these side chairs from various vendors.  Took about an hour to assemble each (consider paying the assembly charge since you can NOT put these together with a screw gun) Once you know what you're doing, they can be put together in about 45-minutes.  Delivery was by UPS -- not freight as they are packed one-per-case.  Check your desk height because these aren't adjustable.  Another nice bonus that reflects on the quality, the fiber covering under the chair has a zipper for access to the screws.  When you're done, just zip it up.  Very comfortable for +/- two-hour meeting.  Good support for your back.