Big advantages:
- Transparent and rather thin, which allows the S3 to keep the line!
- The holes are in place (do not laugh, this is not always the case, some shells do not have eyes in front)
- Although robust (already done some skiing days and one or two beautiful waterfalls)
- Is easily removed if needed
- Adheres well to the support (eg office), does not slip ...
- Price, symbolic
- Bonus: an adhesive film to protect the screen, completely invisible and does not undermine the responsiveness (even at 450 Defender II;))
Faults: well no ... finally see the use, but at this price you do not take many risks.