One of the tempered glass ones? Or just leave your screen bare, I've not managed a single scratch on my S3, S4 or N5.
I bet if you hold it in the sun you will notice tiny micro scratches.
I got a tempered glass protector off amazon and its been great, so much so that I got one for my parents and gf. Feels like glass and not crappy plastic, applies super easy and is perfect, and so far no scratches.
Have you tested the cheaper ones? 30quid is too rich for one imo.Get a Spigen Glass screen protector, they are not cheap at around £30 but I'd rate them as the best on the market.
I only wish I'd had one on my M7 when I dropped it.
Sounds good, which brand did you get?
I got one for £6 off Amazon, applying is super simple, and so far its been solid. Even dropped it once.
http://www.amazon.co.uk/DiGiYes®-Ha...004978&sr=8-2&keywords=nexus+5+tempered+glass
This is what I dropped.