I love my 33x10.50 R15 KM2s.  They worked great on the snow, I have only used them off road on up to 12" of snow fully pressured and worked great, not much experience on snowy or icy roads.  I bought them because I like the look of skinny tires and also because I mounted them on a stock rim which rubbed the a-arm in a 12.50.  But regardless that a 12.50 rubbed I had planned on getting a 10.50, I wanted better mpg out of my tires and Toyota's are light trucks so a skinnier tire from the research I did would have better grip due to less square inch's of the tread block.  I don't DD on them but when I do drive on the street they manner ok, but in general i run 31" street tires on the street so it's hard for me to compare.  This tire seems to form well to the rocks even at full hwy air pressure but aired down work even better.  The one advantage I have found on the 10.50 VS a wider tire like a 12.50 is on some obstacles you are more likely to slide off a rock on one side or the other due to reduced tread width.