This is probably the best screen protector for iPhone 4 / 4S. Finish, transparency, strength, touching fantastic. Easy to install by being a little careful.
BUT: after two months began to take off in a corner, I had to remove it. 25 for two months of protection, it makes Cheros! I did not redeem, but shame ...
Note that another buyer has described exactly the same problem (see the comments of the article link above).