Pros:

+ Great recreation of the "Kürnberghalle"
+A lot of easter eggs and secrets. 
+ Good spread of supplies.
+ Finale was quite good.
+ Nice to see the zombie apocalypse finally reaching Linz. 
+ German voice files and original sounds  used in the finale
+ Also various shops/museums from Austria one could explore.
+ A fair difficulty and nice triggers
+ This is for L4D. Thanks.

Cons:

- ÖBB train was late. ;)
- Finale was totally chaotic.
- Bots don't react right upon the finale.
- Sometimes bland gameplay.
- Some areas were too dark in my opinion.
- Could need more medkits.
- Sometimes directions were missing.
- Sometimes strechteched textures in map 3

Conclusion:

Play it with your friends and you will have a lot of fun. If you ever visit Linz, this map is far better. ;)