I have searched through the threads similar to this but couldn't find what I needed - maybe I just lost the will to survive and missed the info! When I bought my 17" MBP I bought a day later a Crumpler Beer packer ( or thereabouts) but I wasn't entirely happy about the fit - the MBP seemed almost to be about 15mm too long and when zipped up I could see the corners of the MBP pushing the zip out. That bag got Ebay'd and I replaced it with an STM Large Loop. The fit was better, but I can't fit too much into it!! It would be fine as a bag to use if you had to carry paperwork/books, etc as that's all the compartments will allow you to take. Also the straps are not as well padded as the Crumplers and, bearing in mind we're talking about a bag that's fully laden weigh close on 8-9 Kgs, they do dig in and become a little bit uncomfortable over time. I'm saying this as I didn't really use the Crumpler that much before flogging it on ebay. I use a motorbike to get to work which means that I need a bag that will swallow a 17" MBP and allow me to throw in my clothes ( really only a pair of jeans) and a pair of trainers and all the usual accessories that I would normally carry to work. The STM although big enough, doesn't permit me to put the trainers in so I'm now forced to use another bag for my clothes and strap that on the back of the bike - and that is boring and time consuming! I'm not that bothered by the cost although cheaper the better. I have looked at Booq and Brenthaven stuff but to me they do almost look like a generic laptop backpack. The trouble is that most of the places that stock these bags are predominently online sellers which makes the whole process a lottery! Does anyone have any recommendations? As long as they are waterproof!! Many thanks in advance! and sorry for the long post!