Ordinary bookmakers' offices provide their own quotes. The player is forced to look for a more suitable bookmaker to identify the best value for a particular match. The offices always limit the betting amount, which wins when the player loses. As for the betting exchange, the participants compete with each other and can both make bets and put up their quotes simultaneously, accepting them. So it is up to you to choose which of these methods is better. And as for Bookie, I can't say anything specific because I haven't used his service. CentSports NFL Computer Picks allow me to earn decent amounts of money. That's why I don't intend to change the sport, much less a bookmaker's office or exchange.