Michael “Wizard of Odds” Shackleford took a look at the games a few years ago, and shared some data based on his experiences with a series of games. The same can’t be said for Ainsworth’s progressives, which are designed with a Must Hit By model that is based on coin-in. That can make it a bit more difficult to know what your expected value on a play will be and how much you’ll need to invest.
In a previous post I spoke about the WMS G+ Deluxe progressives, and how they increment based on wins.