I've been in the far aft cabin, deck 12, on the ships side (with the larger balcony) (2149) of two different S class ships and I love the location (pool level). I have heard, I think chairs, moving above in each of these cabins but I don't have a problem with it, it doesn't happen often at all. But I'm sure it's a YMMV type of thing. Anyway, on S class that part of the ship is the only place I'll book. (I take the stairs a lot.)