I've been using my InCase Sling Backpack for these past four years though its time to upgrade. I'm currently in China and this backpack has been taken a beating. http://www.goincase.com/products/detail/original-sling-pack-cl55026fr I love the look, though its functionality is somewhat limited. Whenever I need to grab something from my InCase Sling, its cumbersome to do so, considering I gotta twist the whole bag around from my back to my chest, considering I don't want to take it off completely (or can't take it off completely). Using this for the past 4 years has done a small number on my left shoulder; feeling constant restraint at all times, even when not using the bag itself. Normally I carry around my 13 inch MacBook Pro..and other little things, whether it be school books, my iPad, and other little things..like iPod, chapstick, car keys, flip HD, camera etc. Of course, I want easy access to it all when i'm out in the streets running about. I was thinking about grabbing the updated InCase sling, considering its smaller size from 17 to 15 inches..with the added benefit of it being water/rain resistant. Though having the same bag wouldn't benefit my shoulder problems and easy access dilemma. 1. http://www.goincase.com/products/detail/nylon-sling-pack-cl55336 SF-Bags has the Muzetto, which is a really really really nice bag. Seems like a better way to go, despite the heavy price tag. I highly doubt its water/rain resistant, but seems easy access...though it seems to lack an array of compartments for my various little knick knacks for my on the go lifestyle. 2. http://www.sfbags.com/products/muzetto/muzetto.php Finally, STM has been on my radar lately. I see their ads in MacWorld and I love all their compartments on the inside. Obviously I doubt their water/rain resistant, but I just simply don't know that I decided to ask the community. 3. http://www.stmbags.com.au/catalog/laptop-shoulder-bags/alley-small-laptop-shoulder-bag/ 4. http://www.stmbags.com.au/catalog/laptop-shoulder-bags/vertical-small-laptop-shoulder-bag/ Even if its only a small piece of advice it'll definitely persuade my decision. As I mentioned, I'm currently using my InCase which is perhaps on its final run here in China. I'll do my best to take her back w/ me to the states, if she fares well. But I will be needing a bag for college and for the everyday, considering I never ever leave the door without my bag (which usually contains my Mac or iPad).