The only problems I have had are: 1. My 2-year old son was able to rip the cursor button off the unit and chew on it. Luckily, the button was not destroyed, and I could re-attach it. 2. I get interrupted on airline flights while viewing because people are VERY impressed and want to know all about it.
GREAT PRODUCT, and I have recommended it to a friend who purchased and is enjoying it as much as I have.