Summary: I fixed this issue by removing the black circular panel around the lens, so that more air could flow through the projector. I also took the whole thing apart and blew it out with a leaf blower to get all the dust out. After doing that it works like a charm, even in regular mode. Previously I could only get it to stay on for about 5-10 minutes even in high-altitude mode.
Summary: Good for the price, could be brighter (you won't really want to use it during the day unless you have a good way to keep the sun out of your room) and certainly gets loud if your room is hot, but pretty great bang for your buck.
Summary: What an amazing item at such a low price! The Vivitek is bright even during daylight and the fact it's a full HD projector for under $700 is absolutely gold. The unit is bright and has the usual expected features: manual zoom and focus and the options to have the menu appear wherever you want or upside down for ceiling mount is... "brilliant" (pun intended)! It's hard to go wrong with a projector at this price point. You won't be disappointed.
Summary: I have been using this projector for regular tv use for the past three weeks. Have the picture projected on an off white wall, picture is good with in direct sun light entering the room, but scenes that are dark are alittle harder to see. Plan on putting up a projector screen and i will update this review when that is done.
Summary: Personal Experience I only had this projector a short while, but I was really happy with the image quality. For the price I paid I was astounded. The picture was super sharp and I also liked the high brightness. Overall a huge improvement over the Sanyo Z2 it replaced. In the end I chose to return it in favor of an LCD because the rainbow effect was bothersome at the 3x color wheel speed in this projector.
Summary: As my first projector, I ignored the hype surrounding the 3d noise that's out right now and instead focused on 1080p. My only real mistake was not fully understanding the throw depth and what size image it projects. With a better understanding of that, I may have picked a different projector given how limited my projection distance is (12 feet).
Summary: The bad: I'm not 100% sure but when I connected a component video cable to my previous projector, a mitsubishi hc1000 720p I did NOT get redish horizontal lines going through the viewed image. Nor did I occasionally get distorted skin tones. However, i did experience this with the Vivitek. Again, this is only with the component video cable. I happen to think that for viewing a digital cable box, its' better to use component.
Summary: I just got mine last night. It was easy to set up even though the manual is on a disc. I hooked up my blu ray player to the projector and slipped in a blu ray disc. The colors are nice and rich with a blu ray disc. I subsequently watched a regular 480p DVD and the picture wasn't so great. This may be attributed to the fact that I was watching an older movie from the 60's so that may account for the grainy appearance.