Choosing the best betting bonus for Massachusetts players was a very hard task because there are quite a few good ones here. But all factors considered, Caesars just about nicks it.
With the $1000 stake back offer, your have the freedom to go big on your first bet, knowing that if the wager loses, you will get your stake amount back in bonus bets.
The bonus validity period is very useful at 14 days, while the presence of nice promos like the Spread The Word promo makes Caesars very attractive indeed.