I'm a relative new comer to reloading. I've been at it for only 2 years. When I started with the idea was that I would save money. I think that happens a lot. Once I got going I found that I could shoot way more for the same money, and I did, plus more.
I currently load for 9MM, ,223, 243, and soon 30-06. Even with expensive components these days my 9mm costs me under $7 a box, and around here you'd be hard pressed to find it in a store for under $12-$15. For rifle I can generally save 50% off store stuff, or I can shoot premium ammo for the cost of the cheap stuff. Most all of my loads are more accurate than retail so that is a bonus as well.
So is it worth it ? For me it is because it enables me to shoot more and I enjoy the ability to make what I want when I want it. I kept track of savings until I recouped the costs of my press, and then quit tracking it. Mostly I didn't view it as cost saving any more, but more as a way to enable me to shoot more often. It is becoming as much a hobby as shooting and other activities that I enjoy. I've since bought more dies, and gadgets, it really never ends.
-jeff