Well the colder it gets the better the PA3's work. Obviously restraint with the throttle is the order of the day but I have no problems starting, cornering or stopping. While not as good as full on ice tires like Nokians, Blizzaks or XIce's I'm still very satisfied with their performance. 8 out of 10.
The performance of the wipers/spray sucks. 0 out of 10. With as hot as the 5.0L runs I wouldn't expect the nozzles to freeze, but they do. The wipers themselves sit far too low on the windshield and consequently the ice sticks to them like glue and doesn't melt.
Thankfully the heater/defroster is really an afterburning jet engine from an F15 and it coverts water drops to water vapor in very short order. 12 out of 10.