I have already say on thing , the only site who propose this amazing choice is 1XBIT but for many its a scam.
Choice + good odds ( prematch and on live ) is necessary to be the best sportbook
1xbit and best sportsbook? Lol. Spoken like a complete newbie. 1xbit offers great odds on purpose in order to attract gamblers and scam them later on. They provide all kinds of crappy excuses to try and justify themselves.
Also, nitrogen sports is an average book these days. There are way better books in comparison like Sportsbet, Betbtc etc which offer competitive odds and are highly reliable.