Hi ladies! I've been lusting on and off after the Wunderkinder, and now that MHB has it in, I'm seriously considering it in black. I've tried searching and researching past reveals, but I still have a few questions... Is the bag heavy? My back is very sensitive to heavy bags - I even have to be careful with my French Nanny and not load her up too much! Speaking of, how does the size of the Wunderkinder compare to FN? I saw a comparison with a Boogie, so I'd imagine the Wunderkinder and FN are similar in size, since FN is smaller than the Boogie... Also, would I be able to hold notebooks or a binder in there? How much can the Wunderkinder hold? Since its a crossbody as well, I'd love to be able to carry it with me when I only have one or two classes. TIA ladies!