i have the tyne ones, they are great at keeping your feet warm, but if your feet are freezing (eg cant feel toes frozen) before you put them un they dont really warm them up, i did regain feeling though by the time i took them off but still cold. if feet are ok beofre putting them on they make them really nice and toasty.
also very very comfy to wear
i have the tyne riding ones aswell, i agree they are big and i find as there is no support in the ankle my ankle "falls over" not sure how to explain it but its my left foot only and when i realise it and "lift it upright" again its sore :cry: but i still ride in them anyway most the time, depends if i can be bothered to put my boots and chaps on, and most the time i cant :giggle:
my mum has the 'tack' ones which she really likes