I just finished assembling this cold frame. It is very well designed and manufactured. It took about 2 hours to assemble. The main slowdowns were due to difficulty in figuring out which corner piece ("right hand" or "left hand" to use with which side pieces and in which orientation. Now that I know how it supposed to go I could put a second one together in about an hour. It should only take about 30 minutes to disassemble in the spring and reassemble in the fall because most of the small parts can stay in place, and the ingenious removable keys that hold things together provide very quick assembly and dis-assembly. The unit has a bit of a feel of being flimsy when it is assembled, but once it is on the ground and the anchoring stakes are in place it is very solid. I have a two bricks nearby to put on the lids if it gets windy. Overall the unit looks very professional and I am very pleased with it.