I'm gonna be getting a 12" iBook or Powerbook within the next month or two (hopefully sooner rather than later), and I'm gonna be taking it about with me quite a lot... especially at uni. I study Italian & Spanish, so usually I don't have to carry a lot, mostly just two pads (quite big), and a few books (novels, plays, sometimes dictionaries), which, for the most part, doesn't really cause me any discomfort. However, last year I also did law and politics and regularly had to bring much bigger textbooks, which would cause some aches and pains if I was carrying them for too long. It takes me about 20 minutes to get to the train station, then another 10/15 from the main station to uni, plus carrying it about between classes etc. I'm seriously considering the Crumpler Roll-o-notes bag to accompany the notebook, which would hopefully also take the rest of my stuff. I'm just hoping you can give me some indication of how you feel carrying your notebook around all day, especially the smaller ones (12", etc). Cheers!