I was never interested in backpack style bags but seeing Bags4Me wearing hers in the visual aids thread it just looked adorable and very stylish. Do you find this style bag to be functional any time of year or just for warmer weather. Do you like wearing your bag on your back? And do you get much use out of a bag like this? Is this a bag that only looks best on a younger woman (I'm 37 and concerned it may not be age appropriate). Let's here your thoughts on Mabillon or other backpack style bags!