In 5 years of ownership I have never never driven Sparky in snow/salt, but thanks to my Audi developing a healthy rear end leak Sparky will pull off limited winter duty, sorry little buddy. I have also found out that this car is absolutely miserable in the snow
The combination of weight and low rolling resistance tires makes it pretty bad in the snow, but with real snow tires it's actually quite stable and then the weight helps.
I found out something else, Sparky is very close to 50/50 weight distribution, possibly a bit more weight over the rear axle than the front. My mother has a gas 2014 Spark as an RV tow car, and wow, it does so much better in winter with all of the weight over the front wheels (I'm sure the tow bar also helps) plus Sparky has gobs of power and those glass like tires that love to break loose on dry pavement have a field day in the winter, a gas Spark has so little power in comparison that I'm not even sure I could get the tires to slip taking off at full throttle from a stop!