In reply to gazfellows:
I would say it depends on where you sit on the time/money spectrum.
If time is no consequence, then Milsey’s approach is the way to go. Winter climbing isn’t that “hard”, grade V always feels about VS/HVS to me, but there is a lot more to it than just the climbing. Navigation, getting to the crag, moving over snow, how to use your crampons and axe effectively, learning about snow, condition, cornices etc all take time to master.
However, if you are money rich/time poor, then a course is a good way to distil some of that learning in to shorter period. Experience pays in the end though…..