Nitrogen and betcoin are both excellent...i would also add Fairlay as they have the best odds plus fast fast payout...fairlay is also interesting because they have a user danhan11 who has created an app which allows for parlays..it is currently being tested w positive results so far..
For agents accounts i had been using AC88 and still do they are excellent but a new one odyssey88 i have been using too and have experienced greatness from them...very fast btc withdrawals and excellent customer service too w similar bookand exchangesas ac88..they do random kyc if any suspicion occurs like multiple accounts like AC88 or any book do so make sure u give verifiable info...
Thanks for the post thegreen. We need more book input from all. That's definitely interesting with what Fairlay is doing and I'll have to look into that further. As far as ratings, the brokers and exchanges are separated from the books.