Yes the chair is plastic but it rolls so nicely on carpet I don't even need the plastic sheeting under it.  It is very comfortable to sit on too.  I wish the back rest was adjustable since I really have to lean back to get to the back rest. That is my only flaw with it.  My desk is a builtin so a regular chair was just too short. This is great because I can finally get my wrists on the desk and not have my shoulders ache after 15 minutes.