Bumper quality alternative with minor defects

At first it is a noble, high-quality and very well protected Bumper alternative.
Then one must note that there are two possibilities for the closure.
1.The closure consists of 2 small screws. The advantage is that everything holds bombproof. I have seen the drawback is that you can make no battery change or SIM card replacement without appropriate tools.
2. There is a small hook, which holds the frame together. Initially quite firm, after some opening and closing it wear out and is with me eventually canceled.
(A colleague of mine has the same frame, his hook seems to be more robust)
Both versions are sitting tight on the phone.
Lintels be intercepted, but a new framework is needed after each fall, because it deforms on impact. My grade 3 has dropped from one meter on tiles ... luckily only the Aluminum Bumper was deformed :-)