Surprise, surprise. I've been using and I'm ahead in casinos, with real money. Sorry to disappoint you. But I won't claim that this will happen every time. It's just that it has happened on the last five visits.
And why shouldn't it work? As the statistics show, 95%+ of casino visitors are ahead during some time during their trip, but 99% finish as losers. The key is quitting when ahead. Yes, you might forego more wins to come, but it sure is a nice feeling to leave with a few extra Benjamins in your pocket.