I do not understand, at the moment only six writers have awarded five stars. Four reviews were excellent though with the minimum rating. I once read that two different monitors are sold under a number, it would be conceivable, too, that there are differences in the selected signal input (VGA or DVI), it can hardly be explained otherwise that such different opinions arise.
My device even in the remotest these shortcomings here among the one star reviews were listed. My Acer has a very generous viewing angles, the sharpness is a treat for the eyes, all picture settings bring superior image quality. As much as I really do my best, I can monitor only give a five star review.