Well, the only STAB you can get with it is with Girafarig and Zangoose, who learn it by Egg move. It can also be a one-trick only attack when combined with Power Herb, which allows you to not have to charge, but only once, then Power Herb is gone. It has a better chance for a critical hit than ordinary moves, but is the same as moves like Slash and Stone Edge. Absol can use it with the Super Luck ability, but other moves are better. It can attack both foes in a double battle, although that can be both a blessing and a hinderance, seeing as how damage decreases. It does have more power than most other 100% accuracy critical hit moves, but that charge makes it worse. I believe that it is only a ingame short term move. These are moves that you teach your Pokemon when you don't have any better moves to teach them as you don't have enough TMs or it is not a high enough level. These are moves that are just there ingame because you can't get anything better, like Chimchar when you just get it in Pearl has Scratch, you only have it because you don't have anything better.