That's what I'm using as stated earlier in this thread
I sent the Whitestone Dome protectors back as they're £50 here in the UK and for me, the amFilm works perfectly and it's hell of a lot cheaper to have 2 of these, one as a spare, for just in case etc
Installation is easy; but my advice is do it right after you've taken the OEM protector off so there's little dust residue there; clean that off and lay the amFilm down and that's it done.
I don't use their plastic outer template; just line the speaker hole up at the top and lay it down carefully etc
Press all around the edges to get decent adhesion and that's it done
Works perfectly with my Spigen Neo Hybrid cases and the Ringke Fusion X case I got too