Plastics4Performance - LEXAN REAR WINDOW

[Robbie98]

Hi guys, thinking of running a Lexan rear window from Plastics4Performance on my 7 for weight reduction as well as a carbon rear hatch. Has anyone ran one and if so any thing I should take into precaution before buying

Are they road legal + going to be any problems with MOT?
Any condensation issues?
Winter issues?
Issues in general?

Thanks
Robbie