This was my first winter driving my 2015 North model. Decided to stay with the factory tires.
For xmas holiday's I went to visit my dad and the road there is over a high moutain pass (The Coquahalla in BC, Canada).
I left it in auto until I started climbing the hills and the roads got slippier. I felt 4wd kick in a few times, but it was not consistent and would affect how I was driving as just fwd. So went to snow mode. Left it there until I reached my destination a few hours later.
the return trip it was in snow mode until I was long out of the hills and on reasonable clear flat roads.
Now I have switched to the Yokaham Geoland G015 tires. Might wait a bit longer before switching next time.
I use sport for having fun, merging in traffic (use the manual shifft in those cases as well), or for turning left or crossing a road in tight trafffic.
Haven't had a chance yet to really use mud/sand (an inch of much in a small parking lot for 50 feet doesn't really count), but look forward to it.