Top boxes are brilliant!!
Safe, secure, you can stuff tons of kit in them, stick a pad on and they are excellent for pillions to lean on, makes them feel more secure.
Much easier to get on and off the bike than a tail pack etc etc..........
And I HATE them! They look shit and ruin the lines of any bike, rattle around, giant air brake, did I mention they look shit
And on a final note, if you ever happen to pick up a bag of samples from Lyons foods in Runcorn, to be taken to a photographers in Manchester, and you put them in your top box, try to ensure the big tub of curry powder doesnt explode somewhere along the way. Your topbox will stink for quite some considerable time
Once, we were couriers..........