Bison CasinoPL Reviews 

Play anywhere, on any site you want—just not on this one or sites like it. Never!
Besides the fact that the slots seem to pay out even worse than usual, they also lag. They can delay withdrawals for as long as they want if they hope you'll gamble that money away too.
Bonuses: Ridiculous. The people running this site are the biggest scumbags imaginable. If you get free spins after you've just lost $500–$1,000, you'll receive only 3–5 free spins on some laughable slot machine that, if you're very lucky, might pay out $5. But even that has to be wagered, and you can only wager it on that same slot. On top of that, only 10% of your bets count toward the wagering requirement there.
From all of this, it's obvious that every feature of the site, in every area, is designed with one goal: to take your money from you.
Stay far away from it.

They give you bonus only on first deposit of the day, but somewhere else say first three. Had to argue to get mine, which kills the mood.

Won a bit but not enough to reach their withdrawal minimum, so I basically had to either keep playing and lose it or leave it sitting there. Felt like a trick to force more bets.

After every deposit there’s a bonus already attached unless you manually remove it. One time I forgot and got stuck meeting stupid wagering again. Just let me opt out permanently.

Every time I try to withdraw they ask new questions: why are you withdrawing, how often do you play, where is the money from. It’s my money, not a loan. Tired of explaining myself.