I have never used a limo service to get from OIA to Disney before, but I have used Limo services here in Indy for transportation to the airport. Here the Limo services can be much cheaper than cabs, and the same price as vans so why not travel in a little more style. If the price is not a concern for you, then I say go for the Limo. It is a nice experience. It isn't anything life changing, but it will be a great start for your trip no doubt. Limos are a lot different than town cars in my opinion. A town car is more like a cab situation (only a heck of a lot nicer). You are just in the back seat and the driver is in the front. A limo is much different. You are a considerable distance from the driver (depending on where you sit in the limo). It would also be kinda nice to pull up in the Limo and have people wonder "who" you are!