I would definatly use one! resistive screens scratch very easy, even if you dont actually
scratch it, you will get the small, fine hairline scratchs in it.
I highly recommend these-->
http://www.seidioonline.com/product-p/spm1htp2s-2.htm
Mine just came in today and I honestly cant even tell its there. Perfectly clear and smooth. I cant stand zagg, ghostarmor or bestskins ever, while they protect the best, they have a rubbery sticky feel and are not clear.
The Seidio one went on
perfect, best job I ever did at putting one on!
No water needed, and it looks and feels great!