uPVC greenhouses

[Tin Shed]

I have an area on my plot where I am thinking of putting a greenhouse - but it is within throwing disatnce of the allotment boundary and could be used for target practice- so I am thinking of getting one with 'uPVC glass' that I have seen advertised in a well known gardening magazine.
Has anyone got one of these - and would you recommend it?

[Tin Shed]