I had a zagg hd on my S4 and though it was really good. Can be a pain though installing wet application protectors. Zagg also don't do a case friendly protector (or didn't) and can be prone to lifting around the edges when used with a case.
At the minute I use a tech 21 impact shield on my note 3. I really rate it to be honest and it is lasting really well.
Some people do complain about the feel that Zagg protectors add but I actually really like it lol
sent from my Galaxy Note 3