Have just returned from a 7 day trip to Europe riding some of the "passes" including & not in order the Furka, the Grimsel, the Stelvio, the San Bernadino, San Gottard.
Not my first time riding the passes & not my first time on a WCGS BUT, the first time with GSAP & what a revelation!
I hadnt really taken to it for general riding back home & found it awkward to use at times, but as I've got more used to it have really got to like it.
Using it while traversing the hairpins was fantastic, got quite addicted to the lovely farty brrrap noise it makes on downshifts & it really helped my cornering technique even allowing clutchless downshifts right down to first for the really tight steep uphill turns & then lots of throttle, 2,3,4, brake, close throttle & back down again Brilliant.
Not always 100% reliable, got the odd clunky change & neutral on occasion but was probably user error.