Every player must stick to his bankroll. Bankroll is the total amount of money you can afford to play with or to lose. With Bet Max button the player can play with the maximum number of coins available on this slot machine. Comp is so called additional bonus, which is given to the player who has been playing one and the same slot machine for quite a long period of time. Comp can be represented by free meals and in come casinos by money rewards. House Edge is an amount the casinos is sure to receive over a long period of time. Payback is percentage amount of each bet dollar, that is paid back. If you play the slot machine with 86% payback it means that it pays back 86% and 14% is the house edge. Remember that these amounts are taken over a long period of time.