I have played there and have spoken to Aden on the phone a few times.
Starting with the positives, the customer service is good, they have reduced juice and some nice bonuses. When I cashed out, my payout was handled very well. I know others who had payouts which were handled well.
The negative is that I am a fairly big $$$ player and they don't like that. My limits were cut twice (from 2K to 1K to $500) before I had completed my rollover. I'm not a steam player and the first time they cut them I was only up a fraction of a unit - so it is obvious they just don't want big action. As soon as they saw I was placing max bets a couple times, they started cutting.
It's like they say about some books: "Their on-line limits only apply to people who aren't going to bet that much."
I don't begrudge books that do that but I feel it does bear mentioning in a forum like this.
When I told them I was going to cash out, they actually put my limits back up to 1K. Everything was handled very professionally.
I would recommend this book. There are a few people they won't be quite right for. Based on what I have said, anyone should be able to figure out if they are in that group.