I have the AW102. It was too small once I moved into video-work and the "sling" got annoying after long periods. I just upgraded to a Kata KT DL-DR-466.
I have the 202 and hardly ever use it. I find myself slinging it over one shoulder too much which causes neck and back pain, especially when it's packed really full. If you do go with a sling, commit yourself to always wearing it properly crossbody.
I have the Slingshot 202Aw and took it on our last trip and while it served the purpose it did get uncomfortable after wearing it for a few hours. My wife bought me the ThinkTank Sling-o-matic for my birthday and I love it. Best part is with that bag you can switch from one shoulder to the other. Can't wait to try it out on our April trip.