Scrambled up and down the North Face a few times as an alternative to the far eastern ridge. Nice route but super loose. I like that one can make this route as hard as you're willing to endure. Lots of space for difficulty.
Just super chossy.
climbed Challenger via the long snow slope/couloir accessing the ridge southwest of Challenger. Pretty good climb, snow to 40deg. Ended up backing down most of the ascent route for the descent. Still lots of snow up there!