"Combining spaciousness, an expansive soft shell, and an attractive, clean design, the Tom Bihn Synapse 25 bag is an attractive choice for people who need versatility from their backpack. The Cache on Rails upgrade makes it checkpoint-friendly, and for bikers and hikers, you can add a safety light or a built-in emergency whistle. Pricey but well-designed, this bag is a winner for people who need a backpack with a lot of space, but also want it to look good."
Read the full review at AppleTell. See also: the Synapse 25.