I have a PPB boxy backpack and DH has a Diaper Dude messenger bag. They are too small for me. We bring the DD bag to the babysitter's house so I guess it works for that.
I also have a PPB wistful weekender and it's...ok. I don't love it. The pockets aren't quite useful enough and things get lost in there.
I love the quality of PPB but I'm more than interested in hearing about what you love.