Although my example Settlers of Catan optically like better, the gameplay is much more varied in Kingdom Builder. In addition, one blocked (at least for two) hardly mutually exclusive. As the looks four, is another question.
In order to expand, we are not yet come, first want to get to know the basic game times properly.
What struck us negatively, the manual has left open a few questions, at least for us, the rules could be more specific. We decide then stop for a design and play so (eg adjacent a ship which is in the water and the water in the final analysis - we do not count, only if it is on a buildable land; we may in the paddock and from the jumping water on shore - we make it possible; one may run a special offer 2 x in a round if you have the plate of 2 different stacks - I interpret the instructions above).
The video tutorial on the Internet is quite nice and could be used precisely to answer such questions.
After a few laps it has certainly well established, but his tactics must change each round. It is also very entertaining, as it has "only" 40 houses and has in each round to build at least 3, no lengthy exchange and purchase phase -> thus for me my favorite strategy game for 2 people. Have fun playing!