We used one at MK in February. The high was in the mid 70s and low in the lower 50s, so we stowed our jackets and went back for them after it started getting dark. I think it was something like $10, and if you return the key by the end of the day, you get $5 of it back. The space was pretty big. Our 3 jackets, scarves, etc, fit with plenty of room to spare. We easily could have put a backpack and some souvenirs in there if we'd needed to. I figure we'll need to do that again this trip if the temps are similar. It was nice not to have to go all the way back to the car (or definitely the room) or to have to lug around stuff we didn't need for most of the day.