Horrible, horrible machine. No matter what I do, I cant get it to produce a straight crease. Have messed around with it for 4 hours and ran through a s$*t load of paper I noticed that the whole roller reel is buckled. Also, one of the rollers was not connected and was rattling around inside the thing. Dont know if this is a one off defective unit but the paper guide markings are not level either. Just do yourself a favour and dont buy this thing.Update: seller, it turns out, is brilliant. Was happy to exchange the defective unit for a new one. Great communications and a pleasure to deal with. 5 stars for this seller. Buy with confidence.