This seems like a very simple straight forward one-shot on the surface, but once you get into it it's clear that it is actually very well thought out. The balance between having a straight forward task and having unforseen challenges involved is really good. That is, in a one-shot, you want the objective to be simple enough that the adventure can get going without too much epilog or wandering around, but you also don't want it so simple as to just be 'they go there and find that with monsters in the way, the end'. This adventure does really well at finding that sweet spot, in my oppinion.
As a note, sorry if this being in english is a problem, but I would imagine your english is far better than my german.
[5 of 5 Stars!]