Cessation means the process of something, and bringing it to an end.
Despite being an active smoker for some time, stopping can have many positive health benefits. For a few weeks after quitting one might experience anxiety, cravings for nicotine, and an increased appetite. The positive side effects include better blood circulation, a stronger immune system, and an increase in energy. In my opinion, yes. Stopping smoking despite smoking for a long time is worth it.