While I don't think any action pistol sport is a substitute for training, it's great practice for gun handling skills. It also helps to point out any equipment weaknesses. You find out quickly what does and doesn't work for you, and/or what modifications might be needed to improve them. Shooting on the move, from awkward positions, strong hand/support hand, reloads, malfunction clearance, use of cover, and time pressure are some of the benefits. Every practice string should start from the holster, using your preferred carry system. Static range practice is ok for marksmanship improvement but little else. If I had a private range, the one piece of equipment I would consider essential would be a dueling tree. It would also help to have someone that's better than you are to compete with. I like to shoot what I carry from time to time when I'm not feeling gamey. You can have a lot of fun without spending a lot of money on equipment in IDPA. The RIA would fit in nicely in the CDP class. Hope you get to give it a try SpirtHawk, bet it you do it once you'll be hooked!
Savage