The White Water Rafting portion of the tour 2 hours and the dinner was excellent!! A lot of fun for everyone. The river was cat 3 to 4, very comfortable for my wife and the other woman that we rafted with.
I wouldn't waste my money on the 'lunch' and the 'Spa treatment'. The lunch only had 3 items to eat and in a make shift style eating facility. The spa treatment was the worst my wife and I experienced during our vacation in Bali. The dinner was great at Jimbaran, lots of seafood and great sunset.
I would recommend just taking the rafting tour Only and later that evening go by yourselves to any of the numerous restaurants in Jimbaran to enjoy the fresh seafood on the beach.