I don't have a Bold, but I tried Zagg first and returned it after I got a Clarivue. IMO it was a much better looking product. The price was WAY better too....Zagg was 1/$20 and Clarivue is 2/$11.
I bought the ultra clear one. You can't even tell it's on there! (My daughter tried Zagg on her Ipod Touch first and returned it for the Clarivue also)