I tested it out on a noob for 4 nights straight to see if it worked... It just all depends on what you are fighting.... It detects the color of the monster and clicks to fight it so you should try and get a distinct color... They do not have any keyloggers, viruses, etc. I would leave it on over night, it just all depends what happens... one night I got like 15 attack levels, and one night I got one and died... Try it out.