It is definitely worth it. Yeah, it can be tough in the early stages but it gets far better with time. I really have a hard time believing that I used to smoke after being quit for quite some time. I do know smokers, see that they are struggling health wise, seeing the financial costs of cigarettes, having a lot of people look down on them, etc. and I can tell you that there are tons of reasons to quit. Life is a lot better without all of the negative parts of smoking and, with time, you should see that there really aren't any positive things that go along with smoking.
Quitting is definitely worth it.