This game has recently became available on Steam again... So I bought it right off the bat.
Otherwise, I had the differently named, but exactly the same game: Anno 1404 and Venice.
Let me tell you, I have put probably put as much time into this game as Anno 2070 on my profile--over 300 hours. Anno 1404 (which is what I'll call it) is a fantastic game and I slightly prefer it over Anno 2070. Anno 1404 is simply beautiful and you get drawn into it easily. You get to craft your empire and your production chains and keep people happy. Getting to the point of building the Imperial Cathedral is fantastic as well. It is a beautiful crowing achievement for the time you spent in the game. The screenshots you can take of the world and what you build are simply beautiful as well.
Playing it with a few friends is fun too. However, Anno 2070 is better for that in the end. Though make no mistake, they are very similar games... just set in a different time period. Anno 2070 will have a few more challenges, and funner enemies to square off against (Keto and Strindburg). Though, Anno 1404 has much larger maps, which is what 2070 needs. After a while, 2070 feels quite small when you get fast ships and air vehicles.
Regardless, having both Anno 1404 and 2070 in your library, if you love these type of games, is simply great as they are great games! We can only hope Ubisoft and BlueByte make the next Anno game just as great!
I fully endorse this game to anyone who likes games of this genre!