I got mine last week. I absolutely HATE having the flu, and if it does anything at all to lower my chances of getting it then it is well worth the price! (It was free, at work.)
As an aside, my perception is that I seem to have fewer colds and viruses in years when I get a flu shot. I am not aware of any scientific basis for a connection between the flu shot and bolstered immunity. Maybe my perception is a modern superstition.
Could be. Anyway, all considered I would rather get a partially effective flu shot than none.