This was the first greenhouse I have made, my creaky back and just plodding along meant 2 afternoons to build the frame, another for the glass. The instructions were clear, if a little small. It went together almost perfectly.
Guttering and water collection works well, I bought cheap down pipes online and captured 300L in a month of higher than average rain.
I would highly recommend this greenhouse to anyone, the building, now the growing has been a very rewarding experience and feeling like I got a bargain is a bonus.