I have a set of these and they work very well,
I was getting so much grip on the front that if you hit the brakes hard the rear locked up first and would chuck the tail out.
Only problem is getting them on if you don't have much clearance between the tyre and the wheel arch, turning the wheel out does help though.
Always carry a set of gloves. If you don't your hands are usually numb after you have finished putting them on

It is also a good idea to order them now as when the snow starts falling they are usually out of stock.
