In May 2010 I bought a Apollo Tomato House which had a bad design feature in that the roof was flat and the rain water collected in it.
Last year I bought another one because I had damaged the zips on the original one (my fault not the product) but as the weather was mild by the time the tomatoes were ready to go in it I did not use it in the end.
However after the excessive gales during the winter as I had not bothered to take it down it finally collapsed.
Today I got the new one out and was delighted to find they had redesigned the roof to allow the rain water to run off. This has prompted me, in fairness, to update my comments on the product. However before you run off looking for this product it seems to be now discontinued.
The original post can be seen here