I use ace sportsbook, they are legit. They got me on board with a cash bonus, but I was cautious so I played it slowly to test them out. Now I use them regularly, and I only have two complaints: 1) As packer said, rollover is a little high on some of their bonuses, and 2) they started me with a lower limit than I expected and made we wait a month before they would raise it up. I've only cashed out a few times, but so far every time I got it fast with no real questions asked. BUT I referred in my buddy two months ago, and he found that if you use a credit card to deposit, they do ask for more crap to cash you out, so probably should stick to money gram since I never had any issues.
Hope that helps.