Nice review, but I have to say I can't agree with some comments made afterwards, I really like this set myself.
Biggest thing of playmobil that I own, and I bought it last week for 40 euros. Which seemed like a very good deal considering what comes with it. Its not only a fort with a wall and tower, but theres also a treasure room and a dungeon with a trap door and some nice docks. Plus three stunning clickies and lots of accesoires.
Which seems to be something that the lighthouse is missing when I look at the content online. Just soldiers and a cannon.
Personly I really like having furniture and all kinds of clutter to decorate the place with, and this set comes with a good amount of that.
These things are also useable for other historic themes, which increases their potential. The fort design is also quite nice, I notice some call it small, to me its big but my brother's castle wasnt that big and as I said, its the biggest thing I own now so I don't really have much to compare it with.
Good height for siege towers as well, allowing it to be used in medieval sets quite nicely.
Regarding the position and compatibility with other sets, I personly prefer to have the L shaped docks positioned in a way that it goes around the rock formation, to better allow larger ships to dock there. This would also allow other docks or structures to be positioned against that side. Not attached, but its not like such big structures slide away that easily.