Have had my winter tyres on for about 3 weeks now, the difference is simply amazing.
Even on cold wet roads its surprising, let alone snow and ice.
Drove back from north yorkshire today and driving on snow, ice and slush and the car didn't even blink, no traction control light and no abs (the damn thing on summer tyres cuts in every so often on wet roads).
They almost caught my girlfriend out though, she had just driven up to mine in her car (normal summer tyres) and then she drove my car when we went out. She was having to correct her steering as you normally expect summer tyres to slide very slightly when turning and allow for that. In my car the tyres simply did not slide so she ended up oversteering the car.
That was on cold wet roads.
Simply put for £360 fitted its only £100 more than my excess and a whole lot less than having the hassle of destroying a car due to shite road conditions (like last winter)