Coby TF-DVD500 Ultra-Portable DVD Player with 3.5-Inch LCD
Does exactly what I bought it for
Update: it's now 2013, so I had it 7 years and this player still goes on trips with me.  It has been a worthwhile purchase for the way I use it.  I definitely feel like I've gotten my money's worth.<br /><br />Update: I've had this for 2.5 years.  It has been on at least 8 plane trips. It has been dropped on the floor a couple of times and the stand popped off - but then it was easy to put back on.  The player and display is working fine.  One of the external speakers died - but it will be easy to replace them with other speakers.<br /><br />Before buying this, I made a list of criteria...  I wanted something portable that would play MP3s, CDs, and DVDs. I didn't want something that I had to load my existing physical collection into my computer and transfer to a player - which eliminated most MP3 players, like the IPod. I wanted external speakers to play music/audio in a small room.  I wanted to watch movies on a plane.  This is the model I bought, but mine came packaged with external speakers for $120.  I set the speakers up on a shelf in my small room and leave the unit plugged in and ready to play music or audio until I need to travel with it.  I am completely satisfied with it and would recommend it (but not for kids under 13).  I've had it for 2 months and it has been on one trip with me.  The screen is adequate for airplane viewing and the included headphones and volumn level of the unit overcame surrounding plane noise.  I'm not an audiophile - so I can't say that the sound quality from either the speakers or headphones will satisfy a sound expert - but I'm happy.  When using the unit with the LCD on, it will get hot over time. When I listen to music, I turn the LCD off and it never even gets warm.  The battery pack doubles as a stand for the unit - I really like that - but worry about ever finding a replacement. The buttons are small on this unit - the included remote is nice, but I don't travel with the remote.