I am thinking about playing a the SS machines at the 4 Queens and wanted some advice on which one people have had better luck on?

For instance, I have been at sams town the last couple days and I watched a little old lady but in 60 dollars and she had at least 10 strikes while I was sitting there waiting. The other machine I put 40 in and got one, another guy put 100 in and got two.

Anyone have any experience they would like to share?