I've got this bag, and I don't love it. It's a bit floppy, and I find that things fall out of it when I unzip it (while it's on the bike). I'm thinking the top-opening handlebar bags look more practical.
Thanks so much for letting me know this. Guess I won't take that lunch trip to REI today
I wonder if I can make a map holder (zip ties and some sort of plastic sheet) and then use a fanny pack as a bar bag, just wrap the straps around the handlebars.