From the left a Dibond Mendel90 with 200mm build height, my acrylic Mendel90, Richards's Emaker Huxley and on the far right his polycarbonate Mendel90 printed by the Huxley: -
Mary points out the differences between Mendel90 and the Sell's Mendel opposite: -
Most visitors hadn't seen 3D printing in real life before but a reasonable number had heard of it. All the people that inquired were pleasantly surprised how affordable it is.
More pictures of the rest of the faire can be found on Tony's blog.