Very good performance and easy to use

We are two designers at home and each of us has two screens, it was a moment that was said that we had to do something because we had everything and anything with a screen another. History top it all, I'm migraine and find a balance in the screen brightness without killing them or destroying contrasts colors was very problematic (my main screen shoots yellow, the blue side, I have never managed to put them manually agreement).

At least one problem solved: the probe greatly reduces the brightness to avoid burn for light. If at first it seems that the result is "gray" rather than white when comparison, grab a coffee and go back enough to see how our eye it was just accustomed to very poor settings.
I tested with several of my various works, the contrasts are immaculate, very accurate colors (it could be verified since the 4 screens are side by side) and I already feel after several hours of use as eye strain is less. The 4 screens have the same colors with a contrast just sometimes varying slightly, depending on the quality of the screen.

We are both extremely happy with this purchase, I recommend it for anyone working in the image. For that price in addition it is not very expensive and the device should take several years quietly!