Summary: Great projector. I picked a used one and it has been great. No problems at all. Awesome picture that can handle being in a lit room pretty well when the brightness it turned up. Then the quality looks really nice when the lights are off. Would definitely recommend.
Summary: Personal Experience I bought this unit a long time ago. I still have it and it continues to work flawlessly. If you find one used, I highly recommend it. Only criticism is it is not that bright. I use in our basement rec room. Problems Not that bright
Summary: First time projector owner. Cost me $350 to replace the bulb (direct from Optoma). I did not want to take chance at buying from one of these no name distributors. They may or may not work from the reviews I've read. The projector makes a good picture on my wall (no screen as of yet).
Summary: The HD70 from Optoma might not seem like much in today's world of full 1080p and 3D projectors, but it is a secret powerhouse. Despite the 720p resolution, the image quality is excellent. The projector doesn't make too much noise, even in bright mode, and the case is appealing.
Summary: Personal Experience Apart from some subtle artifacts - due to the 4 (iirc) segment spinning wheel - it has a beautiful picture. I've had it up to 96" diagonal, and the image is smooth and detailed. I haven't tried it on HD material, and expect near full HD quality.
Summary: This was my first projector purchase ever and I use it primarily for gaming and watching movies. I bought a refurbished one in 2008, and a new one in 2010. My first one still runs great today!