Installation of this holder is a bit of a faff. It took me numerous attempts to slide the flexible plastic hooks into the gap between the front headrest and seat of my Tesla. And in trying to remove it, I managed to slide it into the fabric seam of the headrest which nearly ripped it. Not a good start.
After much wiggling, I did manage to get it into the right position. Popped the adjustable spring-loaded vice in place and attached my iPad. This will hold an iPad (even if it has a thin case) or an iPhone (even the pro-max sizes with a case). And whilst it does the job, nothing about it feels premium. Plastic feels a little on the cheap side, but I'm perhaps being precious about my Tesla.
Overall, this will hold your tablet up, and there's a screw to tighten it so that it feels secure, but it installation is tricky and requires a lot of patience.