I was at JANugget over this past week (4th of July) and I watched over the course of a couple days, as one of the $ progressives, rose up to $8000...and actually got up to $12k (might have gotten higher, but not much) before it got hit...
The best BASE game I saw on it was 8/5 Jacks...the pro's were banging away at it for like two days straight...I watched it for a while, and told my gf "Sure, it's a 102% play, but the damn variance is THROUGH THE ROOF!"
and fwiw, my gf hit her first royal on July 3rd (5c Royal on Triple Play)
Not bad...having played SURELY less than 40k hands...