The manufacturer specified the brightness uniformity at 80% and this agrees with my measurement that the dimmest corner was 20% less bright than the center of the image, which represents good performance.
Color uniformity appeared very good when projecting a full white test image.
Operating the projector in its Eco, low powered, lamp mode reduced the image brightness by approx. 30%.
The manufacturer specifics the on/off contrast ratio at 2000:1 and I measured a contrast ratio of 2142:1 when operating in "Standard" image mode. While well short of the contrast performance of a mid-level home theater projector, this is better real world performance than is possible with most business and education class projectors, including those that are spec'ed to offer much higher values.