Card in the box asked that I contact EBS Furniture or IDS HOme before leaving negative comments.  Could not find a way to do that - so here goes.  I am pretty good at assembling things.  With a total of 5 wheel, and 12 bolts - one would think start to finish - 30 minutes tops.  2.5 hours later - and with help from another person - finally assembled.  Holes provided on chair back and base not lined up (at least not without help).  The provided allen wrench is less than useless.  Resorted to one of my electric drivers with an hex bit to get it done.  And then a LONG driver to tighten fully.  On a positive note - and there are not many - it looks like the picture and the raiser and lower mechanism works (so far).  I would not buy this again.