The first was after 6 hours of operation, the lens full of dust (inside). Initially not very bad, as this is not perceived when focusing the image. At first, however, it was so bad that you have already seen light in dark scenes pale "dots". On top of that from the very "unfestem" housing light at unfavorable locations such as the fan and out but also comes from the lens itself. The lens or the aperture of the lens would simply be "small"? Because if you want something slightly from above and holds against this no longer occur without influence on the image to take.
The second did not even work properly because the speaker and the outputs were over.
The third, unfortunately, the same problem as the first. Operation after only 2 hours were already the first 10 grains of dust in the picture and hundreds of parallel in the form of 2 strokes to see up and down (probably a kind of filter). Why is saving so hard at this point remains a mystery to me, because at least after a few months I would have to turn to the very criticized Support Benq.
I do not understand how people can give 5 stars, the picture is pretty good for the price range, although not as good as the TV but it is also much larger. The first effect is certainly a WOW effect, but I think just CustomersLinked Arsche (just like the DSE "Dirty Screen Effect" of televisions, since there very few people, out of me inexplicably here, notice ...)
If I'm going to just 2 hours heaps have dust grains again, I would like to not just a few weeks or months zoffen with the support of Benq. Really a pity, but my request has the Beamer just in image (although this is not perfect, 4/5 stars performance) met.
The volume, however, which is so criticized badly I can not understand. At 1 and 2 Beamer these were much louder than the 3 trial, yet for the price also here in my opinion completely ok. Can you imagine just like a PC without "Silent" fan.
3D effect was very (!) Good, even if you want something to be careful here at the image size, because if you span the Bofen here, so that they are still just as supplies in 2D mode a bright image, you have to 3D a problem ( because the image is much darker), so try rather earlier.
If people that do not understand, I recommend Just looking to make a black screen and the focus (image size) to go big from an early age, I'm sure that will be a lot of dust particles in the lens there me so much bad luck you just can not have, that it is present in all 3 devices ... The topic has been discussed already but often, from me therefore unfortunately only 1 star. Had him without the dust problem may still retain, even if the lights are to be seen around the picture in dark places. Would have liked a few pictures taken, but unfortunately my cam is so bad that it only makes black images in the dark images!
EDIT:
Colleague has the Beamer ordered and had the same problem as me. To him, it would not be noticed, he said, only when I approached him saying it. He also noted that there were more and more dust particles in the lens after a few days.
Just a pity that people do not want to admit it, because if such products will receive 5 stars in the future in terms of "quality" We could not change the market. So you can also cut in the foot if you do not want to admit (what man unfortunately tends by nature, if he wants to have some) that the quality is inferior and this violent quality defects are deliberately overlooked. My statement on this -> Too bad!