Matchbook has a lot of potential in terms that they have the volume of the U.S.-based players and therefore focus on U.S.-based sports. But to really gain the rest-of-the-world, offering more Euro-based sports and Asian Handicapping would be a good move.
It is understandable that
Betdaq has more innovations mainly because of their billionaire owner's funding. The owner of Betdaq has also bought a part of
BetChronicle. I guess he does not know what to do with his money. And Betdaq is aggressively trying to get the customers of
BetFair.
Most of the time, if not all the time, the odds offered by Betfair and Betdaq are the same as seen from
OddsChecker. If they are not the same, most likely the event is far from game-time.
These top 2: Betfair and Betdaq have lots of "live/in-running" bets which make you be able to "fix" your problem bets even while the game is running.
The biggest mistake of this "other" betting exchange
World Bet Exchange (WBX) is that they do not offer moneybookers or other e-wallets for deposits and withdrawals. This has been the usual question of potential customers... "why no moneybookers?"
Slowly but surely, new innovations and offerings will be found at Matchbook. A start would be "currency choices" and Asian Handicaps.