Not ideal
If the mounting clips are installed above the window, it's very difficult to hook the safety grille in place. And even if you manage it, it doesn't fit properly and there's too much play when the window is tilted.
The side parts can only be attached to the left or right side of the window, so only on one window sash.
For windows with two sashes, it's not possible to attach it between the sashes, and you can't close the window.