Sorry to crash the chorus of approval, but I loathe and detest those big cassettes. The big jumps between gears are less efficient and mean one is constantly groping for the right gear in rolling terrain. A triple with a much tighter cassette at the back is much the better way to go if one wants a climbing gear in my opinion. It also means much less shifting up front, because going up and down the gears on the 39 middle ring is good for 22-23 on the flats and adequate for moderate hills.

I recently went 11-speed on one of my road bikes and foolishly bought a 50-34 compact and a 11-32 cassette. Horrible, just horrible. I've now put a 12-25 on it, which almost, but not quite, makes up for the horror that is a 50-34 compact crank. Next step will be to revert to a standard 53-39' or maybe one of the new 52-36 jobs if I'm feeling feeble.