I just returned from the Liberty and the best way is to start your play by using cash in the machine. If you have a hit or you have credits on the counter, you can insert your sail and sign card into a slot on the upper portion of the machine and then after you creat a password you can upload your credits from the machine to your card, then go to the cashiers window and cash out the card, or insert card into another machine and download the credits to play that machine. I like uploading the credits onto the card. That way you don't have to worry about having an empty hopper and having to wait for it to be filled. I had a couple of bad days and then 2 good days at the end of the cruise.