I've got 4 of those on the Impreza. Might as well take them off and drive it on the rims in the snow!
I've never, in my life, driven such an unmanageable car on snow! That includes my old rear drive Sierra estate. 4WD is utterly defeated and the braking is hopeless.
It goes a bit like this.
1) Impreza moves
2) Toyo Proxes fill up with snow
3) Impreza spins wheel or two
4) Engine Revs pick up beyond 2500
5) Turbocharger gets excited
6) Impreza spins 4 wheels and wanders off in some random direction
That might sound like enthusiastic driving but I swear it isn't. It goes from gently pulling off in 2nd to petulant rally car faster than I can lift off the gas.
But, it's all down to tyres. Just picked up a 2nd set of rims and I'm now shopping for winters. Just got to hope I don't die before they arrive (or put a MOT on the XR4x4).