Do you know the price point at which they stop sounding like a jet engine? I can stand it for short-term evaluation of a product, but I definitely would not want to use this on a regular basis. The noise is one thing - the space heater effect is another. Holy cow, this thing pumps out a lot of hot air. I'd think that it would be brighter given how hot that lamp gets.
That said, the picture is pretty nice. So far, I've only tried it projecting onto the wall in my kitchen. It's one of the untextured walls in my house, but the color is definitely not white (I've done a number of my Amazon reviews with things on my kitchen table, and you can see the color of the walls), and it still looks pretty good. I haven't calibrated it with a disc, yet, and I think that I could adjust the color and tint to help offset that.
Going in, I assumed that 720 would look like absolute junk compared to my 1080 TV, especially since the point of the projector is to go bigger. I haven't projected an image much larger than my TV, yet, but it actually still looks really good. Sure, I'm projecting it onto a semi-flat surface with eggshell paint on it (so, there's definitely some "noise" in the image), but the resolution looks good. Perhaps a real screen would fix this, but at least on that wall, it definitely needs low ambient light to be any good.
Again, I think that this is more of a business projector being marketed for home use. I was thinking that before I got it, and when it showed up with a carrying case...it kind of helped solidify that thought in my head.