Very useful to have a viewfinder on the Sony M2 RX 100, but this is an electronic viewfinder, the details are certainly fine, but the color and contrast are overvalued relative to natural vision. There is a slight vibration but not very annoying that reinforces the impression of artificial rendered through the viewfinder. Otherwise the product strengthens the unit with all information about shooting posted and clear with respect to the display on the screen, especially when against the light.