We did it three weeks ago before traversing the whole ridge. The couloir itself was in great condition at the time, but that was 5-6 days after a fairly substantial storm. Snow was consolidated and we sank in 4-6 " the whole way up. Didn't even seem much steeper at the very top. The hardest part was probably approaching the couloir up the big snow slope before -- lots of postholing until we stuck to a wet avalanche slide path.
Everything but the very top is shaded, so snow conditions will depend on temps mainly. This is the right time of year so I'd say give'r a go.