I just picked up Century: Spice Road. I've only played one game, but my impressions are positive so far. The theme is rather bland, but the game looks nice. The Golem edition of the game looks much better, in my opinion, but the Century series (three games planned, I believe, all of which can interact in some way) is continuing only in the spice theme.
As far as gameplay goes, Splendor is a great comparison, but there is just enough more to Century that I like it more even though it is almost as simple to learn and play. You are engine building with the goal being to purchase the scoring cards (forgive me for not remembering what each card type is called), which cost certain combinations of spice, represented by cubes. What makes the game a great step up from Splendor are the action cards you can buy. The cards allow you, on your turn, to play them to take certain actions. These actions usually involve upgrading your cubes to better cubes or converting certain combinations of cubes into others. On top of that, once used, you need to take a "rest" action to take any back into your hand. The engine itself is much more interesting the Splendor. Splendor is just a snowball engine where your purchase power keeps getting bigger and bigger as you purchase more. Century actually makes you think about interesting, and sometimes complex, conversion programs. That said, the game is very light and can be taught to anyone.
My impressions so far are positive. I usually like these kind of games but then shelve them as their novelty wears off (Splendor and Machi Koro are collecting dust in my house). I think there is enough depth in this that if my wife continues to enjoy it, it may come out from time to time when we need a quick game.