I use mine all the time, but I have the auto-fold setting turned off. At work, the spaces are tight enough that I fold in the mirrors to make sure someone's bag doesn't bust the mirror as they walk by. At home, 50% of the time I fold in the mirrors as, with mirrors extended, I only have 2" of space on either side and I'm not always perfectly centered. So as I go over the lip into the garage, if it looks like the mirror is close, I press the button and fold it in. I would use the auto-fold feature, but it auto-unfolds before I leave the garage and I don't want to see the mirror extended and forget that I do not have enough room to clear the mirror, so it's on manual.
Between the buttons that select to adjust the left or right mirror (above the rotational dialpad for moving the mirror), there is a center button that folds in/unfolds the mirrors at will. Can even be done while driving.