Instructions for building frame looked complicated at first, but soon got the hang of it. Found the glass to be very fragile, small shards would flake off the edges, also broke a couple of pieces which were a very tight fit. had I known that horticultural glass was so thin would not have purchased it. Once finished I did not feel safe with the glass and I purchased the polycarbonate pack from you at an extra cost of £174. Product would be better if horticultural glass was not sold with it. Now glass removed and polycarbonate sheets fitted I am very happy with my purchase.