The best sites for sports betting, including the best sites for MMA betting, have several essential features in common: reliable and consistent customer service, competitive lines and a great interface that allows you to easily place your bets. Beyond that, each bettor is looking for a site that caters to their unique needs and requirements as a bettor. Sportsbooks might differ dramatically in which sports they offer odds on, or how they handle payouts, which can make a big difference to bettors.