You need to know that it needs to be cleaned after every range session or there's a possibility that it could rust.
Loading is a lot slower than with cartridge guns but it's a very gratifying and fun experience to shoot them. It provides a loud boom and the opportunity to adjust the loads to your comfort level.
Most folks don't get tired and bored of shooting cap & ball revolvers but instead look forward to doing it.
It's nice to not need to buy brass cased ammo. Basically a person only needs round balls, powder and percussion caps, a nipple wrench, a powder measure and a powder flask to dispense powder with.
And buying an inexpensive loading stand to hold the revolver upright helps to make loading easier.
Here's a video of my son and I shooting a Remington .44 revolver:
http://www.youtube.com/watch?v=ID9LB...e6AUAAAAAAACAA