all those multi line machines are a losing bet because you are betting against yourself. if you are playing twenty lines you are not going to win on every line. Also, take a nickel twenty line, 20 max machine. if you hit max bet your betting $20. but only $1 on the line. Your better off playing a single line $5 or $10 dollar machine. However, those multi line machines are fun if you get into the bonus round. I usually only play for a few pulls, hope for a big hit then move on