Summary: My unit was manufactured april 2011. I thought that, being led, I'd have one less source of problems... I was right, since the led didn't die. But the unit stopped working in the middle of a movie. Since its DLP, i think that the spots on the screen are due to the mirrors stuck at a specific position. I'm not sure what went wrong, I never used the audio of the unit, but the day it died I decided to plug the output of the cable tv receiver (A/V out), and use a headphone.
Summary: This projector was great the entire 10 minutes it worked. After those first few minutes of joy and awe, I began my journey into the labyrinthine realm of the Samsung customer service department. After two replacements and many months trading phone calls with Samsung, I think I can confidently say there is something very wrong with the way this product is designed. To put it simply, the units worked for a few minutes and then refused to turn on.