Just finished my first trip using this bag as a carry-on and it worked beautifully!  The fabric is durable and attractive with the pink contrast stitching.  The interior is very roomy with extra compartments and super cute pattern in the lining.

The BEST part about this bag is the comfort.  It was really thoughtfully designed to cradle under your arm and isn't too heavy, even full.  I had magazines, my ipad, and even my little purse tucked into it.  The bottom sits flat and doesn't "tip" over, again the way it was designed.  I would highly recommend this bag to anyone looking for a great carry-on or gym bag.

The only recommendation I would make to Timbuk2 is somehow to incorporate a water bottle pouch either inside or outside, but I LOVE it!