Originally Posted by Eastbay1K

Back to the OP, and not exactly his question, but you can expect that some of your flights will have extremely vigilant carry-on police, either at check-in or at the gate. Expect that at one of your points, you'll be asked to weigh it, shown a sizer, etc. The closer your bag size is to a standard US-sized rollerbag, the more likely this is to occur. Just be prepared.