Bay bag: handles, shoulder strap, or both?

  1. I'm thinking about getting a Moka Bay, and have seen it with handles only, shoulder strap only, and both.

    For those of you with the bay, I'd love to hear your experience with any of these options -- how you like your bag and how comfortable it is to carry and how easy to use.

    I think I would prefer a shoulder trap but it seems that it might be harder to find on sale or below retail on eBay.