Developer is giving up on this app
I would have given this game 5 stars, but after only a couple of months in the App Store, the developer has announced that due to unspecified disappointment with the apps performance, they are not going to support it with any further downloadable content. They have already released at least one downloadable map for other platforms (iOS, Steam, web) that will not be made available to Mac App Store purchasers.
Arma virumque about
Ticket to Ride