I bought a brain bag to replace two bags that I had been using; a rucksack with a fleece, books and other odds and ends and a specialist laptop rucksack for my mbp.
When the brain bag arrived I was very impressed at the compact nature of the rucksack. While you can fit a lot of stuff into the brain bag it is not a large bag. The compression straps really compact the brain bag!
The brain bag on the left with the other two bags;
The brain bag is the same height as the laptop bag (which is on the right), but it allows met to carry so much more and it distributes the weight so well that the load that used to be in the other two bags feels far lighter when in the brain bag. A touch of magic from Tom Bihn :p
The brain bag;
Brain bag with vertical brain cell in rear compartment;
I like to take a dslr with me when I go for walks / hikes and a camera body with one lens, spare battery, cf cards, etc fit into a lowepro 75aw.
The 75aw in the front compartment of the brain bag;
There is enough room for a second lens in a lowepro case in the front compartment, along with a rain jacket (I live in Ireland and we are having a very wet summer )
I also ordered a snake charmer and it is a brilliant idea. It holds all the cables, two hard drives (one for superduper back up and one for movies and picture library) and fits into a corner of the back compartment with the mbp.
I now have a rucksack that allows me to bring everything I need for work and for a walk/hike.
I visited New York in 2006 and didn't bring the mbp with me. I didn't own a bag at the time which would allow me to carry a laptop and books, jacket, camera, etc in one rucksack. I won't have that problem the next time I visit
I must also mention Darcy. She was extremely helpful when I was ordering the brain bag. We are quick to condemn bad customer service and I must say that I was delighted with the help I received from this company.