Winter-Bee-Kind Insulation Cover

[rdlp18]

Has anyone ever used Long Lane Honey Farms Winter-Bee-Kind Boards?  I live in Chicago where the winters can be pretty cold and have a roof-top hive.  I was considering purchasing one to help with insulation, condensation and ventilation this winter.  They also come installed with 5 lbs. of candy board.  I can't seem to find any testimonials or comments from anyone who has actually used them.