An already excellent game was upgraded to superb with the release of the Salsa expansion. Three other members of my gaming group have been inspired to purchase their own copies.
We have played all the maps, and particularly enjoy the just-released Egypt map. One advantage of the game (as for Terraforming Mars) is that up to five can play. Too many otherwise good Euro-games limit themselves to four.
The elegant game system (replicated in the almost-as-good Transatlantic, by the same designer) is simple - play exactly one card, execute its action, then the turn proceeds to the next player.
I have played countless deals of Duplicate Bridge since 1980. As a reward for my misspent youth I have gained the attendance medal of Gold Grandmaster.
Duplicate Bridge can be compared to tournament chess in the skill level required. However, I retired from chess because it was too solitary a game. But in Duplicate Bridge you always have your partner (and perhaps your team-mates) to discuss your side's successes with during the after-session post-mortem.