Puerto RicoBGG is pretty simple to learn. The rules are not too complex and the turn actions are pretty straight forward.
However, like most games that have Victory Points, the game can take a few plays until you understand the flow of actions and which moves are "best".
I would highly reccomendreccommend this game. I learned it at lunchtime at the office and, even with expiriencedexperienced players, did pretty well, even tying for the win my third game.