I know some will not appreciate my strength, but I would give it 5 stars, if more in, there were the instructions to change myself broke my window and my LCD iphone 4! Of course, I would find it on the Internet (it's not the problem), I'm just procrastinate.
But understand, that my laziness aside, this is PERFECT! It deserves 5 stars WIDELY (but there is not a small booklet to tell how, for a witness like me, it is disturbing).