I play on cloudbet and windice. And I can say that they are both legit. Wide variety of casino games on cloudbet and an easy to win roll dice on windice. And also I think you need to update this list. You might want to check windice and also the stake.com to be added on your list. They are good too. Try those sites so that newbies can also know if it is good or not.
Cloudbet is into the market since long time now so it could be trusted a lot and even i am betting on cloudbet since years now so i trust it from the bottom of my heart. Stake or windice are comparatively newer gambling platforms as compared to cloudbet i guess so it always gets challenging for peoples to consider these newly launched platforms with their funds.
Also considering beginners, they would always find suitable to gamble on a platform which could give them some free satoshi from their faucets so that they can test gambling without having any fear of loosing their money.