Would you mind sharing your experience with the bays in some detail? I'm recently considering buying one (in oxblood ) but I'm a little afraid it's not as practical as I need it to be. To access it, do you have to take it off the shoulder? Or can you leave one strap on and reach into the bag? If not, is it a hassle to take it off, open it etc.? I want to use this as often as possible, but I know that won't happen if anything about it annoys me....