It's not a ShotTriggers release, but it is from the brilliant mofos at M2. It's as good of a port as possible. If you are a fan of the Darius series, this should be a no-brainer. I get it, there are a ton of Darius releases lately, but I'd argue this is the better purchase over others (I swear I don't work for M2, lol), because of the meticulous detail put into this port as well as, the extras added that truly take their games to a higher level. Once again, this isn't quite on the level of the M2 Shottriggers releases (Ketsui, ESP Ra.De., etc.) it's absolutely the best version of this game, AND you can play it anywhere, on the go.
Great game, and totally worth your time if you are a shmup lover, like me. Actually, I resend that statement. You do not need to be hardcore to love this game. It helps, but it's a great arcade shmup that most anybody can find love for!