Yep, rode into work on them this morning and had them fitted for a bit at last year’s strathpuffer on my 29er.
They work well on ice – you still can’t hoon around like it’s the middle of summer, but you do stand much more chance of emerging from corners upright if you take it steady
They do drag terribly on tarmac (and make a racket), but then that’s only to be expected.
In fresh snow they’re probably no better than any other knobbly tyre, but they’re not awful until it gets deep enough to warrant a biiig wiiide tyre