Depends on how you use your device. I’m a fan of screen protectors in general. I’ve used ghost armor and I think it’s a little nicer than Invisible Shield. Less glare, thinner install. But there can be odd interactions if you also use a cover.

I have used both brands on my phones up until my current phone. The reason I stopped was when I was in Vegas last year I was pocket carrying, as normal, and the protector came off. I must have been sweating a bit and it caused the shield to slide. This was the first time it happened, but since then I have gone without.