Bought these screen protectors to replace one that came with a silicon case I'd bought for my iPhone back in September. That protector became so badly scratched that within a month, I was barely able to read the screen!
I've now had the new one on for about the same length of time and although there are a few scratches on it, they hardly show and do not impair my view of the iPhone's screen at all.
They cover the whole front of the iPhone, not just the screen and can be a little tricky to apply. I ended up with 2 specks of dust under the first one I put on, even though I followed the instructions closely; but as they don't really detract from the view of the screen, I left it on.
That slight niggle aside, this is an excellent product - in combination with my silicon case, my iPhone is now completely protected. The protector is looking good after almost a month in place so at this rate, the pack of 12 could well last me at least 2 so that is absolutely fantastic value for money - 12 out of 10 I'd say!