Persistent payer tile always keep me on my toes when it arrives and money train 2 is actually very addictive indeed. When you have a persistent payer, all you want is the game to continue going by getting even a 2x each time because it reset the 3 chances again. I usually use the "buy feature" and there I mean the persistent payer is really good, never played money-train normally (whenever I play, I use buy-feature) so don't know how much is that worth on regular spins.

In case you haven't tried, I suggest you to play Dog house which is another very good game but again, I play with buy feature so don't know how goo it actually is with regular spins. Talking of buy feature, Gem Bonanza is actually very good if you keep getting the matches and somehow reach all wins 4x stage or so.