Club Fitting?

I have never been fitted for clubs, but for those who have do you think that it stays consistent from year to year? I have a few friends that seem to get fitted every few months or adjusted and I seem to shoot better scores with them with standard fit Titleist Clubs?

It could stay consistent, however, that all depends on your swing/game. Sometimes people will get fitted again after major swing changes/improvements. I check the lie, loft, and a few other things at least once a month. Loft and lie because I use forged clubs. Most guys with forged clubs will have them checked out every so often, due to the soft metal.