Not very bad, at least I have been using it for a while. Although I made sure I had nothing less than or more than 200,000sats in my account. And I withdraw immediately I accrue additional 100,000sats. The script works based on the normal martingale system which makes it fair enough and helps reduce the chance of loosing.
However, I cannot guarantee anything as you already know that these betting platforms can be crazy sometimes and it is just a game of luck. I have lost before with very long streaks of losses which I regained back afterwards anyway. If you really want to bet, I will advise you see it as fun and if you win, good and if not, all thesame.
However, the script has honestly worked for me. I just always try as much as possible not to be too greedy by rolling lower bets and I always have a daily target of 50,000sats.