Size of Brain Bag for everyday use
I have been browsing the site and forums, and I am thinking hard about the Brain Bag. I am replacing an old worn out Spire bag, and like the looks and layout of the Brain Bag. I worry that it is too big for every day use. I like the ability to stuff when needed (I travel a lot), but typically carry a 13" MacBook, a few spiral notebooks, a folder or two in main compartments. I carry a raft of small stuff in pockets (MacBook charger, sometimes a spare battery (it's an older one), cables, flipchart markers, various adaptors, tylenol, hand sanitizer, ...)
My question. I think the Smart Alex is probably a more ideal capacity, but I really don't like the design and layout. Do people find the Brain Bag works at less than capacity with the sides synched? Will it be too big? I'm not worried about size on me (I'm 6'2"), but more just that it will be too big for every day.
My second question: Moderately stuffed, does it fit comfortably under an airplane seat?