I just got an iPod touch but I figure you iPhone peoples will know more about this than over at the iPod forum. I'd like to get a screen protector. Do they affect the sensitivity/functionality of the touch screen? I'm looking specifically at this one: http://www.amazon.com/LCD-Screen-Protector-Creative-Micro/dp/B000ODVEQM/ Or is there a better one somewhere? Would you recommend protecting the screen in this way?