In reply to jas wood:
Hasn't formed all that often in recent years, and an ascent is complicated by the avalanche-prone nature of the approach. It should be climbable at some point most seasons, but as always opportunism is the name of the game. February and the first half of March tend to be the best months for this type of route, but it will undoubtedly have been done at all times.
Suspect it can be desperate if thin, or a fairly steady III if there's been a good build-up and steady cold conditions. It got a good few ascents at one spell last year, although it did get quite hacked latterly.