I have not used the g-horn. If I come across it I'll definitely give it a shot, however if xur sells it I don't know if I'll buy it. It's good because of the cluster missiles or whatever, but I know I love the truth because MOST of the really hard adds in the game (minus the cabal majors and hive majors) especially in the raid, have void shields. I can play on hard mode with the truth, and ANY prae/mino attempting to take a conflux is dying on the first shot.