Screen protectors for the Nintendo Switch are a no-brainer. However, I've used a few (including those from official Nintendo products) and these are by far the easiest to apply and the ones that feel the most protective. I love the fact that they also come with a wet and dry wipes kit per each protector. Definitely recommended.
This is 100% sized correctly for the Switch Lite, I got it right the first try and you can't tell there is a protector on the screen. I don't know why some reviewers are saying it's the wrong size, unless they were sent the non-lite version?