I only played Hot Roll in the casino once but got very lucky holding 3 twos with a kicker drew the fourth two for 20000 quarters. On a bar machine no less. Gave my buddy 600 bucks for talking me into betting the extra coins to activate. I kept the 5k and gave him what cash I had and his buddy 100.
The multiplier can really add up. And the average is 7X, unlike STP where I seem to always get 2 or 3X. And I find it more appealing than UX (must be the craps player in me). Good luck.