To me the most useful feature is follow after combat. As soon as you leave combat they will follow whomever you have set up.

You can share quest and flight gossip, have each toon talk to the flight master and what ever the master does the rest follow, saves a little time but of more value to me it just makes things a little easier. It is usually the little things that annoy me setting up the battle and macro's is fun, selling and organizing loot and equipment is not this helps a little and every little bit counts.

I hope you enjoy it. Also check out automation an Ace mod for other options that might be interesting there is some overlap in features but automation has some options that are nifty, sell greys auto deny duals etc...