I don't like those old trees that doesn't clip on studs, they feel out of place, they are not ABS, so they simply doesn't feel like Lego.
This church, while basic, capturated the essence of such a building, with interresting details, like rounded back, and the stone stairs up the roof (I love this feature, while this was not very common in early medieval times, as Ben said). In its scale, it will fit nicely with the weetabix castle, apart for its doors, to compare to the Weetabix castle's dungeon's.
The washed white was not in the trend in my area, nor the fired clay roofing, but this church structure wasn't, too, and there weren't gray bricks when Lego set it out.
The year clearly tells us this is out of time in a medieval landscape, but once again, does Lego worlds always have to be accurate?
Building it with bricks without tubes may be quite challenging!
Quaraga> Not sure those 1x1 and 1x2 windows got glass in this very set (those windows had clips inside to equip with optionnal glass). Since it is not "openable", I would say there's no interior details, just a guess. Edit from looking at peeron, there even doesn't have inside floor (plate).
It is once again an odd thing, the 309 box shows long sills on the windows, but Peeron list them as short ones. (Many sets have different parts from what's displayed on the box, as the prototype horse head in the 6061, and one soldier's arms supposed to be black from the instructions)