The bit that gets me is before the Cloud, when you go through Congleton, over the crossroads by the church and drop down under the railway line...and then very steeply uphill.
I usually whack it up into the big ring to have a fast run down the drop, under the railway, but then don't change back down quick enough and get stuck in completely the wrong gear on that short steep bit.
Lots of crunching from the gears and an impromptu trackstand...