I haven't used 1xbit before but I also haven't heard that many good things about them... I think you should just stick to the books everyone uses and talk about here. I've been using Heritage Sports and it has been great so far. I also recommend everyone to look for reviews made by professional bettors. Bookmaker's Review has a rating guide just for BTC sportsbooks and betting sites and it's a legit site so, check it out https://www.bookmakersreview.com/best-sportsbooks/bitcoin/ hope this works!