I personally like Nitrogen's UI and design - clear text, neutral colors. One of the few sites that don't make my eyes bleed. Their UI is efficient and organized. I especially like their search feature which allows you to quickly find the teams/games you are interested in without having to scroll through a long list of matches. MAybe other sites have this also, idk, but I like it.

Best thing about Nitrogen imo is their odds and fast grading. Your bets are usually graded within minutes of the match ending. I just wish they had betback/lossback and some kind of rewards program.

I don't know why people keep bringing up Directbet. For one, they have been gone for a while now. And two, they had shit odds. I also remember they were also slow to update their odds - not that that is always a bad thing, but still. I also remember that they would frequently have only a partial offering of the sports I like to bet on - NFL/NCAAF games - from week to week. Not talking about games that were "OFF" for whatever reason, but there were a significant number of games that they didn't even list/offer, like wtf kind of sportsbook is that?

Anyways, just my two satoshi's.