NOTE: I played this mission on Expert. One of my biggest issues with this map - the incredibly aggressive loot goal - may not be as big of an issue on lower difficulties.
There are a lot of things this mission does well: * amount of content (took me ~105 minutes to complete) * attention to detail * variety in environments * rope arrows * use of ambience
The story is fairly basic but definitely above average.
Unfortunately this mission is also quite frustrating due to some awkward design choices. * The loot goal is almost 100% and some of the loot is virtually impossible to find without using the console. * While there are two main objectives that can be completed in either order - you are effectively punished for going in one order by having to do some serious backtracking and having seemingly nonsensical readables/level design. This probably added 30 minutes to my playthrough. * The AI is pretty thin and easy to circumvent. * The route to the secondary objective is creative but wholly intuitive.
Overall it's still an enjoyable mission - but I got frustrated enough to get sloppy with my sneaking and wound up using the console to get the last bit of loot I needed.