I don't know that there's really any inconsistency between the two descriptions given (DW's and Marc's). The trick is that the step down is really only for the belay, and it's only a step.
I'm not sure I agree with the 9+ rating. I think it's very important that you be comfortable with the type of climbing involved, first a slightly grungy chimney, then hanging out at steep stances below a roof, fiddling with gear and all. The crux is sort of a step out, reach around, finding blindly the best holds. I had to make a couple of exploratory forays, coming back to the stance, before committing. But once I did, the moves weren't so hard. At least 9-, maybe 9, I'm not sure about 9+.