Nitrogen
They have recently had issues regarding shady withdrawals coming from unauthorized people accessing accounts. Thus they are recommending all players to use 2 factor authentication to prevent this from happening. That being said... Nitrogen still remains the best bitcoin only book in the industry... fast and free payouts with decent customer service. They lack live betting and alot of markets bettors enjoy such as Team Totals, Goal Scorer markets, Card betting and more. They have vanilla offerings but they do what they do very well..
Cloudbet
Cloudbet may have one of the best live in play betting platforms in the industry... They seem to offer tons of markets on several sports. Some betting markets can't be found anywhere else such as "race to 2 points game 1,2,3,etc (tennis)" They have decent limits on most sports however pregame betting at Cloudbet should be avoided... There have been reports that some pre game bets have taken over 48 hours to grade however most live in play bets are usually graded within minutes after the event is over. Their withdrawals are super fast usually taking no more than 5 minutes. One major con is that their customer service is severely lacking. They have no live chat and the only way of communicating with them is via email... in which you will usually get a generic reply back stating that they are working on the issue at hand. This is a major drawback with them as it leaves the player with no means of communicating any issue they may have in real time. Other than that they are a very worthy out..
BetBaller
BetBaller is a very underrated bitcoin shop. They offer shaded pinny numbers with decent sized limits, in play cashout which is a common offering in the UK market but no US serving shop has that available to it's players besides BetBaller... you can cash in your wager before the game ends minimizing loses and securing profits. They offer a wide range of sports and markets. Most soccer matches have over 60 markets to bet into (goal scorer, card betting, 1st half team totals, handicaps and much more) Their customer service is very good both email and live chat however their hours of operations differ from day to day. Withdrawals are very fast as long as you withdraw during hours of operations... usually taking no more than 5 minutes. If you happen to withdraw whilst they are not online it may take a bit longer but you will always see your money within 24 hours. Just hop on live chat and ask for a withdrawal and you will get paid asap... They also have a very nice bonus offer as of now for new depositors. Lastly they also have a brokerage platform (vipsportsbook.eu) in which they offer accounts with access to pinny, betfair, matchbook and more. As mentioned this shop is very underrated and they are making huge strides within the industry.
These are my TOP 3 Bitcoin Sportsbooks as of now... I play at over 15 shops all offering different options... but as of now these 3 shops listed are the BEST places to bet into if you are a BITCOIN player...