As of a couple of days ago I can give you a bit more of a review myself! Just back from a 5 day tour and I'm glad to say that on the bike there was plenty enough stiffness in the sole of the Rumbles that I didn't notice any discomfort from 5-7 hours of riding in the day. Also very comfortable to walk in, although I'd occasionally feel a bit of a scrunching with the cleat coming into contact with rough ground. I suppose in theory I'd consider hiking in them after removing the cleat between rides, but I'd be a bit concerned about damaging cleat bolt threads, etc. so more likely in practice to just use non-SPD shoes, since I would definitely have a second pair in my luggage even if trying to pack reasonably light.