Yeah, man, that third barrel saved my ass in quite some situations! Ofc it can get you in trouble if you are short on chips, but overall it is profitable bet (for me atleast)When semi bluffing with a flush draw, its always good to bet half the pot or just over, this is because as the pot builds you will get high rewards for your flush/straight if you hit it and if you don't there is still a good enough reason to fire a third barrel and hopefully take down the pot!