STSBet has a truly vast range of sports to bet on, they advertise as having as many as 50! At the time of writing, they had listed 47 on their site but that is still the most of any bookmaker we have reviewed to date.
They are the official betting partner of the Polish National Football team so obviously a lot of their focus is on football bets. The average market at STSBet works out as a very competitive payout of 95% however this is even better on top tier football being closer to 97%. They especially focus on the Polish Ekstraklasa and the other top European Leagues. As you go down through the leagues the odds do weaken to an average of closer to 93%. Each match in a major league has just over 150 alternative bets as well as simply win/lose/draw, like Asian Handicaps, corners, cards, special and proposition bets.