Chrome is pretty good -- I've got the Metropolis.

It's one-side-only for riding, so you won't be able to change shoulders if yours get tired. But, it fits very well on that shoulder, what with the form-fitting pad and all. The strap adjusts with one hand, both the part going into the main buckle and the excess that wraps into a separate buckle. The underarm strap keeps the bag from sliding down to your hip (which I wanted to tell one rider about, but I was stuck in my car and could only watch as he clumsily kept rearranging it.. lol).

There's one big cargo area, two narrow vertical pockets (each about the size of a 24 oz water bottle), one open flat pocket, one zippered pocket, slots for pens, pencils, and cards, and a secret stash pocket (you'll have to find it yourself ). The waterproof liner seems invincible, and the way the top folds over doesn't appear to allow water to sneak in, either.

There's no padding, though, so it helps to add something soft if you're going to be carrying rigid, pointy objects. And, like spaceballs was asking about, it can restrict your view over your shoulder, even with a helmet mirror, if it's loaded up really full.

Its main drawback, I think, is the fact that it only rides well on one shoulder. On the bike, that's really not a problem for me, but standing up, more weight is carried by the shoulder than my back. If you're standing around a lot, like using it as carry-on luggage at the airport, you can switch shoulders, but it's not quite as comfortable on the opposite shoulder.