If you installed a roost the vents would basically be pointed at their faces. Not good at all in a cold climate.The impression I get is the coops were marketed at people who might keep two or three hens in their back garden. My sister has an older model and and keeps four hens. The hens are roaming the garden during the day so the coop is only used for sleeping and egg laying. There is a small run attatched, not particularly secure but it could be improved, where she shuts them in when nobody will be at home.
You can make a roost bar for the coop without much trouble.
One of the features is that the coop is double layered and this provides some insulation and thus keeps the coop warm and dry in the winter months.
For the conditions above it may be worth buying one but the limitations are fairly obvious.
Would I buy one? No. There are better recycled plastic coop options on the market considerably cheaper.