The expansion is particularly important for many players, as the game is over very quickly otherwise. Each of the basic game knows knows the lie with 6 players always many cards in the game and the 2nd not mix coming back into the stack. Even if you "only" additional "normal" beans card uses it pays for itself. It also has of course also fun variations.
5 points are not exaggerated, especially since the game is not really expensive and thus offers a good price / performance ratio.