Not bad, but improvements necessary!

I opted for the Goodstyle screen protector because there is here for the front and back of a bullet-proof glass. The set with cleaning cloths and tape to remove dust particles is well put together!

Negatives:
- Protector slightly too thick, too short and too narrow!
- Positions of the recesses not perfect
- At least the back is quite sensitive. After just two days, the first scratches clearly visible, even though the smartphone is only worn separately in your pocket and is here and there on a table!
- Price too high for the quality!

Unfortunately, there are few alternatives that are available at short notice.

Update:
After about two weeks use I can say that the quality of this armored glass is really miserable! The Z3 is with me most of the day quietly on the table. Otherwise, it is alone (without keys!) In your pocket. Nevertheless, the visible scratches from day to day accumulated. Tonight, I now had to find that the glass is cracked across the back !!! Therefore, now reduce the star of 3 to 1 (the more a star is too much!).

Stay away from this "bulletproof glass"!