First of all: I had initially described the much echo problem in conjunction with the shell, which is definitely lies on the envelope. The caller will hear a strong echo when you own the phone with a silicone sleeve. But that is on the device. I have it sent in for repair and now the phone with no matter what shell works. Anyway, I have before I einschickte smartphone, relies on the Council to increase the microphone opening the envelope. At first with a drill, then with a utility knife. Of course, without success, and of course so that Unlike the chopped casing now. But since I have now bought another shell, I can very well compare: The look is indeed a matter of taste, I find the frosted glass effect but quite successful and it does not work cheap. Some of the seams are not perfectly finished what you see and feel. The shell is quite stiff, making it difficult to fast fitting and removal. In addition, the outer keys are quite hard to use, which can be an advantage even when wearing the phone in your pocket. And I think this robustness protects very well when falling. It protects the screen where it survives a bit. Lets a little air between the 'frosted glass' and the battery cover what the grip hurt and caused a faint clicking noise when printing, audible when the phone moves when using the telephone in his hand. After I was able to map the echo problem smartphone I was quite happy with envelope. The disadvantages described, so I thought, would Cases. Now I have the Belkin Grip Grafix envelope, which I can not find a flaw. In terms of grip, key pressure points, slip resistance and mounting and removing it suggests this envelope by a mile, but was 10 euros more expensive. So only 4 stars for this shell, 5 I would give the new.