Once you can tell us about the payout speed you'll probably find you lose access to 365bestI can't comment on their payout speed but as far as I can tell they've got the best product for those betting early on the races - 365 Best (as compared to Betfair, Sportsbet, Luxbet, TAB and Centrebet).
It gives the best of the price when the bet's placed, SP and best of the totes. Most of the others offer topfluc based on official on course bookies top fluc - not much good when you find value on Thursday ahead of a Saturday race meet.