Considering the price, I thought that I risked nothing but expected to receive poor quality.
Now, I just got them.
The silicone case is classic and fits perfectly S3. nothing to say !!
and the screen protector is specific to Galaxy S3 and not universal.
It adapts perfectly to the screen and the more I have set only 30 seconds to install it and it really very easily and without any bubble, I do not even need to press the screen with protection a rigid card as shown in the manual.
This protection works perfectly with the fluidity of the touch S3 !!
In short, really to buy eyes closed especially for screen protection and the price !!
I have even a control board to have an edge protection.