SDR peak brightness is okay. There's no variation in brightness when displaying different content, and it should be bright enough for a well-lit room, but it may struggle a bit in direct sunlight.

Do note that the peak brightness was measured after calibration and with the backlight set to maximum. Before calibration, the monitor was able to achieve the advertised 350 nits in the 10% window. In other words, you can achieve higher peak brightness, but at the expense of color accuracy.