I bought this for a recent trip to Vancouver from Houston and thought it was great!  I was traveling with my husband and toddler and the organizer was able to organize my son's markers, my pen for customs, some snacks, ipod + iphones, multiple headphones, 2 water bottles (one for me, and one for my son), and much more.  One perk I didn't realize before buying this was that since it kept much of my in-flight belongings on the tray, I had a lot more room for my legs, especially for my knees.  I was also able to tether my son's drink and ipod to it via the strap rings.

One small con that I found was that it does not close all the way when you have the whole thing closed, so if I accidentally turn the thing upside down, a stray marker would fly out.  I only used it for the flight, though, so I didn't encounter this issue often, so I can live with it.

I was deciding between this bag and the one made by Magellan's, and I selected this one because I needed the large zip pockets for larger items like magazines and papers.  The one from Magellan's has a see-through pocket for iphones/ipods, but I have a clip on my iphone, so can easily clip it to my bag and watch my shows that way.  I'm really glad I got this and will not fly without it again.