Eh. If you spend lots of time roaming around the country-side in place of using the fast travel system, this would probably be of some benefit to you. But honestly, if you're roaming around the world to begin with, I doubt you're much concerned with how quickly you're getting from place to place.
At the end of the day, this is a feature I rarely use, and I would imagine the same is true for most casual players. If you have a burning desire to purchase a DLC for this game, consider the Season Pass. It has a bunch of content, and will add more overall to your playing experience.
I recently puchased a game called Doom BFG with the company called Steam. This game wouldn't start and gave me alot of trouble. Steam doesn't give refunds and didn't like it because I oped a dispute with PayPal to get my money back. Steam on purpose freezed my account with them. I purchased this addon with Amazon and should be able to use it's key to download it on Steams website but Steam blocks it.