I bought this for a small project that needed a camera facing outside. With my previous camera, I had to open the window and keep adjusting the angle to get the view I wanted. This one attaches directly to the glass, so once I found the right position, it stayed in place without needing repeated adjustments.
It also seems to handle video through the window reasonably well, which helps avoid having to keep recalibrating for glare or lighting changes. For a setup that does not require outdoor mounting or opening the window, it has been a practical option.