This is a reimplementation of the original Carcassonne with an expansion built in. It contains all the components and can be played as a stand alone or in combination with the other expansions. The wheel is an interesting mechanic that adds some randomness to the game (other than tile drawing). I'd suggest this expansion for completionists/collectors (like myself) and for new players looking to buy the base game with a built in expansion.
Another great Carcassonne game, this is a good supplement to buying the original. One can play with or without the wheel, which adds an element of randomness (as well as strategy), making the wheel-free game a mirror of the original Carcassonne game. How can you go wrong? It's very fun, as its popularity and runaway success illustrate, and suitable to all players.