The feeling of being in control and acting on your free will on the spot is demonstrably not connected to actual decision making will. The whole concept of free will is so vague that debating if it exist or not is useless.

If you think that "free will" is becoming aware of your decisions just when you make them, consider the fact that the human perception of "Now" spreads over 3 seconds or more. The ordering of two events can swap up to 5-7 seconds in some cases (ever feel that you are thinking about somebody and then they call you).

There is some evidence that your brain does stuff parallel and out of order and then marshals them into stream of consciousnesses where causality of internal processes seems right.