As I reported here shortly after purchasing the bike, and riding to western North Carolina with my wife, I got to experience the ABS several times as we went down steep, narrow, mountain roads with loose gravel on the pavement and inevitably a sharp turn at the bottom. The first couple of times it was pucker factor, and later, just heightened awareness.
And I resemble that remark -- I'm making the trip this week on the original Metzlers with iffy tread ~6,100 miles, and plan to switch to the Michelin Commander II combo when we get back.