There is probably not a lot of quality difference between the B&Q and the Gardman ones. My dad used to have a glass panel greenhouse when I was younger and that was solid aluminum frame. I was worried about how bendy mine was when I put it up. Got the frame built and it was wobbling all over. Started clipping the panels in and it firmed up nicely. It was fairly cheap and I think I'm the same having had about 10 years out of it and it probably has about 20% of the original glazing. The window never seems to fit and close quite right!
What I have found is where the clips press into the panels, they crack after a bit of time and wind, and it is a panel failure around the clips that causes them to come out (but I'm going to try the tape in future).
It is a shame the orientation is wrong for me. It runs roughly north-south so gets the afternoon sun on the side of it. Next to it (east) is the shed full of plant pots and gardening tools and I'm always nipping between the two when starting off seeds and potting up. That shed was not put on any sort of base by the previous owner is is rotting into the ground. An ideal would be to go for something like this (Greenhouse with storage shed end) but it would have to go east-west and I'd not get as much sun on it without a major redesign of my veg patch.
You must be logged on to see external links