The monitor has the standard menu of ASUS’ monitors without any additional features. It is user-friendly and free from extravagant design solutions.
By default, the monitor has 90% brightness and 80% contrast. At higher contrast many monitors usually lose some details in lightest tones, but this model doesn't suffer from it. To achieve a 100nit brightness of white I dropped the brightness and contrast settings to 58% and 56%, respectively. The monitor controls its brightness through the matrix.
The monitor correctly reproduces all halftones at any value of contrast (making allowances for the narrow viewing angles of TN matrixes; the image changes dramatically beyond those angles). No banding is visible in color gradients. Backlighting is quite uniform with barely noticeable darker areas in the corners of the screen.
At the factory settings this monitor’s gamma curves have a considerably lower gamma than necessary. This is especially conspicuous with the blue curve that is almost straight line. The onscreen picture looks somewhat whitish as a result. The monitor reproduces all halftones, even though not exactly correctly. The curves retain their shape at lower contrast values.
The color temperature setup is amazing. There is a small difference between the temperatures of different levels of gray in the Warm and sRGB modes, but the temperature of the former mode is going to be too low for most users while the temperature of the latter mode is about 2000K lower than the required 6500K. The difference between the temperatures of white and gray amounts to a few thousand degrees in the other modes, and the calibrator could barely measure the temperature of dark gray in the Cool mode.
The color gamut of this monitor is close to the sRGB space, but offers a richer green at the expense of some red and blue.
The average response time of the PW191A is 16.8 milliseconds with a maximum of 33 milliseconds. This is a normal result for a last-generation TN matrix without RTC. The matrix is slow by today’s standards.
This monitor’s brightness and contrast aren’t record-breaking, both being on an ordinary average level.
Being a rather mediocre product in its parameters (and its color temperature setup is just awful), the ASUS PW191A is remarkable externally. It has an attractive and memorable exterior design, touch-sensitive buttons, and good adjustment options. Its price is not low for its class, by the way. I think it is going to be a good buy for people who care about the monitor’s appearance more than about its image quality.