It seems logical to me that there is no free will. Everything was specified at the beginning of universe, we and all what we are doing is just a result of countless events and coincidences triggered by big bang.
But if someone truly believe that there is not free will and think too much about this topic he/she tends to suffer for the lack of ambition, motivation, plans and decisions.
Those who believe that people have free will in their hands and those who never even think about this issue are more likely successful and have happier life.
Don't think too much, just live.
In the end we all will die anyway.