I just moved from Nevada to New York.  I got rid of most of my stuff and flew here.  The Thule Crossover 38 Liter Carry-On came just in time to make my trip.  I am really impressed with the overall quality of the bag.  I stuffed it as full as possible and it held up perfectly.  Initially I was annoyed by the sunglass holder, which seemed gimmicky and a total waste of space, but it turns out you can easily remove the rigid case inside the holder and reclaim all of that space.  Even still, it seems like a silly addition to the bag.  I left the rigid piece in Nevada because I knew I would never use it.

The one thing that bugs me, though, is that the design does not allow it to function very well as a backpack.  The bag is too boxy to wear comfortably on your back, especially when it is full.  I didn't have any problems finding or using he straps, though.  There are loops on either side of the bag, you just slip the metal piece on the strap through the loop.