I got this just in time for a cross-country (USA) trip.  It fit perfectly over the tray table and gave me great access to everything I might need during the flight, without me having to reach into my bag, under the seat or in the overhead.  I would recommend this for anyone who wants a book, a netbook, a Kindle, paper, pen, water bottle, asprin, or those small things that you always forget until you are buckled in all at your fingertips.  My seatmate was still able to get by my seat with this attached to the tray and I still had plenty of leg room.  Great idea that I wish I had for those long overseas flights.  I won't travel without this again!