I generally have only positive things to say about this car.
At -45'F ( if you let the car get that cold ) I am positive it won't work well... maybe not at all. If it does, you can expect about 9 MPG!
But... I'm sure you all in the far North are diligent of using plug-in heaters and parking indoors... then you will be OK.
I've driven one for 3 years, and it gets me where I need to go, but acts strange at below -0F degrees, and acts a little scary ( wouldn't want to be far from help ) at below -15'F.
The use of a plug-in heater heater helps.... a lot.
You in the
far North probably know more tricks than us amateurs using Block Heaters, Battery Warmers, and grille covers in balmy Minnesota.
Sorry if that scares you, but that's me being honest.
Truth be told, there is more that can go wrong... but I'm not saying it will. Is any car reliable at -45'F?

-John