I have been looking for a good solution to protect my S7 edge.
Have used Zagg invisible shield products in the past and have always been very happy with them.
You can read all the blurb and see it put through it's paces here :here
THE VIDEOS ARE VERY IMPRESSIVE !
Most prices are £30-35 so this is a very tempting price if you own and want to protect your handset.
Zagg also offer a lifetime free replacement, if the glass fails, (within warranty terms)
Quidco also available.