We only have it with the clip and it is perfect, it doesn't move or fall from its position. I can see my baby quite well. I recommend it

The suction cups keep falling off constantly.
You can't see the child's entire face, as it is small and far away.
Update: I waited 1.5 years to use it - at least with the clip, since the suction cups are useless - now that the child's seat has been turned forward. You have a decent view of the child when you support it on the driver's visor, however, the arm is so loose that it can't hold the mirror, which eventually "falls" due to its weight, no matter how many times you try to reposition it. The most useless purchase.

It works perfectly if you have it in FRONT with the clip (I haven't tried the suction cup).
It's not big, so if you put it in the back, I imagine it doesn't work/see.

For installation on the driver's sunshade, it is super!
I can see the child very well!
I have been using it since we changed the direction of the car seat, so I don't know how convenient it is for the rear window.

Waste of money. Even if you have the eyes of a hawk, you can't see the baby that is reflected so small and deep...

The suction cups constantly detach from the sun, causing it to fall continuously. In my own car, which is a four-door, when I opened it towards the trunk, it fell onto the child in the car seat. It is also very small in size, resulting in poor visibility of the child in the back seat. Ultimately, a useless purchase....