I’ve used them a fair bit, and as a walking option although better than most, they’re compromised by having a chunk of metal in the middle of the forefoot, as the sole wears, that becomes more of an issue and it’s quite unpleasant on rock, though less on a problem on grassy stuff.
If I were planning to walk more than a mile or so, I think I’d either ride on flats with lightweight hiking boots or mids or shoes even or just throw some approach shoes in my pack. I doubt the extra weight is going to make any noticeable difference unless you’re a Stravaholic, in which case they may mess with with your head…
Great in snow with mini-gaiters btw, carry micro-crampons for neve/water ice and nice all-round trail-riding boots for stuff where you walk occasionally 🙂