So far the greenhouse seems to be preforming as intended.
The temperature in the small "tent" is about 10degrees warmer than outside.
Winter so far has been ,, well abscent.
So far we have'nt had any lasting snow at all. except an occational snow fall that melts almost instantly.
Still , it's only halfway through February , so Winter has got about 2 months to make a comeback.
It'll be interesting to see how the tent performs when its under -10 outside.