Usually I played on nitrogen too besides of directbet. But nowadays nitrogen have some issues which is not fix yet so I would like to warn you not to play there until they fix their issues. But still depends on yourselves. May be this is about poker but if they have issue on poker games, there is still chance to have some issues on their sport betting too
Aside from the issue on their poker game, Nitrogensports is still the best sportsbook compared to other sportsbook. The rating is still A+ based on this thread #1 RATINGS of SPORTSBOOKS : poster book discussion
It means that it is still very safe to play on nitrogensports, I'm not regular member there but I have never experienced bad things on their sportsbook.