I just recently bought an NEC P221 monitor the other week and am overall pretty happy with it. I just purchased the spectraviewII software online and ran some tests. I share an office with another photographer and we both have gretag macbeth eye 1 display 2 pucks. I was curious to see how each puck calibrated the monitor using the spectraview software. With that said, the pucks give a very different contrast ratio and delta E value, from looking at the attached summaries, does it look like one of the pucks is broken or more accurate?