From my experience, cut the advertised range by at least half. Communicators are great for keeping a riding group together front to back, but if someone makes a wrong turn they are not effective search tools. When you really figure out how to use them, you'll hate to be without them.
Long time Chatterbox guy. They are terrible about stocking old replacement parts, but for the price, battery life, and general features I just keep upgrading as needed.