This past weekend, about 300 free spins produced $259 on a sixty cent bet. The maximum payout on a single spin is 2000 to 1 (during the bonus), I believe, which is a screenful of the premium symbols, doubled during the bonus.

My best bonus was on only 24 spins, and included a screenful of the second best symbol for a $600 single spin payout on a sixty cent bet.