zagg screens are very durable. i've taken a key to mine several times to show people. they do not scratch, but you can see the indention where the key was for a few moments. it's not permanent. i have it on my HD2 now. it does add a slight grip to the screen on occasions, depending what is on your hand. there's other cases that people like over zagg that offer the same performance, but i haven't tried any of them out personally. the zagg cover does what i need it to so until this one wears off ima keep it
http://www.zagg.com