Ya everyone is spot on with the vials stuff. There's no challenge to farming, no fun, and adding in the loading times it has caused me to put the game down for the day several times during my first play through. "Oh look I'm outta vials... well I wanna fight the boss some more.... but no vials and I'm not in the mood at looking at 10 minutes of loading screens". Only thing vials do is discourage people from playing.