There are several types of "Carry Alls" that are made. I've seen everything from hitch-mounted units that come up to a platform to full frame-mounted swing-out units that open up like a rear-tire carrier. Some are just for your bicycles, others will allow you to mount a box (or come with a box) to keep stuff out of the elements.

Anyhow, anyone have one of these, if so what type and how do you like it for an external storage solution?