I've been happy with mine for most of the reasons mentioned by various folks above. Not so thrilled about those hooks, though. Even though my fingers are pretty small, I find it hard to get at the bottom of the front hook so I can push it in to detach the bag from the rack. I wonder how people with big hands/fingers manage to get it done at all.
People should also be aware that because of the slanted mounting system you can only use the bag on one side of the bike and you have to specify left or right when you buy or order. Perhaps this is a small price to pay if it means that you won't have to worry about heel strike.