We were able to test DTNS' PJ yesterday at my house and I was surprised at the performance of this.
Sharpness
It really depends on the player. We tried playing BD ISOs (The Hobbit, Underworld Awakening) using XBMCs internal player. We find the picture a little bit on the soft side. Others would want this being more theaterlike.
We tried playing some Remuxed MKVs (The Hobbit, Escape from Planet Earth, Battleship) using Splash PRO Ex and man I was blown away. It was like having a big full HD LED TV in front of us! Picture was very sharp and for a time I forgot it was a projector.
We went to my HTPCs Desktop and the letters were sharp and very readable. I wasn't expecting this from a DLP PJ. From what I have observed, LCD PJs excel in this aspect. It even beat the crap out of my Epson 8350 when it comes to reading text.
Brightness
This PJ is bright even with ambient lights on. You can watch a movie without washed out colors. I was surprised that it was only on Eco mode. I am not saying that selecting the normal mode would be better for movie watching unless you want to watch a movie while reading a book with all the lights on.
Colors
I do not have calibration equipment but the colors were good in animation but with a reddish hue noticeable in face closeups. These are all on default settings and could be improved more with calibration.
Contrast
It has a contrast ratio of 10000:1. It paled a little compared to my Epson. Lack of black levels were noticeable in dark scenes. I am not saying it is bad but then we had another PJ to compare it with. If it was standalone, you wouldn't notice or care about it. Just enjoy what you see.
RBE (Rainbow Effect)
You'll see them once in awhile. Just brush it away and not make a big fuss out of it.
For the price and its performance for full HD sources, I highly recommend this PJ.