I bought this just a week or two after it was released, after reading a couple of reviews that were in the secondary (not mainstream) media. These reviews must have been written by geeks who never have to actually present anything. They said they liked it. I am not sure why! Because it is small?--maybe, but other than that, it is useless. I can't imagine subjecting a group of more than one to try to look at the image. They would question why I did not just show it on my notebook computer. The largest image possible was about 28" and the larger the image, the fuzzier and the fainter the image.
Don't waste your money! The reason you would buy this is to do presentations on the road, where the portable nature of the unit makes it easy to transport. Sure--it is very small, but the output is absolutely terrible. Why would you want to show any product or presentation through a dirty lens? That's what it looks like. Its like trying to hold up a candle to a negative or slide and trying to view it. The resulting image is skewed, fuzzy, and, in many cases, unreadible. I had it hooked up to my notebook computer with a 13" display and I compared both images. Realize that I had darkened the room to almost black (which is hard to do in most business environments) and the image on my notebook computer was stunning compared to the 3M output. It was like a weak flashlight trying to light up a Powerpoint. Waste of money. I returned the same day it came in, and had a 15% restocking fee for the piece of junk. This is the first product that I knowingly bought made by 3M. It is an embarrassment and certainly will make me think twice about buying a 3M-branded product. Stick with conventional alternatives or use your notebook display. Pocket the $300-$400 and let it grow for 30 years.