320d tourer here. Like it. Not as economical as my old Passat, surprisingly little difference in internal space – with the seats up the Beemer has much better rear legroom than the VW, but a smaller boot, seats down, its a little narrower between the arches, but not a lot. Length is give or take the same.
Night and day to drive compared to the Passat. It really is FUN. The ride is on the firm side – don't have runflats, but do have sports suspension – the dampers are due for changing, so I might have a tinker with something different. Ragging it round the alps this summer though – fantastic.
It dealt OK with the snow – most of the time I rode my bike, but the journeys I did have to do by car, I got there fine.