Initial IDM-9530 5-Inch Portable DVD Player
Good for the price
I think it delivers great performance for the price.  Good color, brightness, sound.  We've used it in cars with the supplied cigarette lighter adapter, in planes, and conected to a TV.  It plays all DVDs we've tried on it, including DVDs made with our Panasonic DVD recorder (I noticed another reviewer was not able to do this--you've got to finalize DVDs on the Panasonic--a procedure not inuitively obvious since it's buried deep in the manual).  My only complaint is that the battery only lasts about an hour and a half.  I'm looking for a spare batery to remedy that problem.