Overall, a great adventure. I'll break my review into a pros/cons, and then a brief review of each Part of the adventure.
Pros include a seldom used-setting (IMO), a desert, good pacing, wide breadth of skill usage, and some very tactical fights.
Cons would be that there is probably TOO much content, more like 3 hours worth, and half the NPCs (namely, those at the end of the adventure) are forgettable because of how "rushed" the end of these adventures always seems to be.
Part 1- This part ends quickly, and gets the adventure started ASAP. Decent NPC interaction and preparatory period for players.
Part 2- First tactical fight. Takes place at night, from within (or without) the ring of caravan wagons. Cover, options, and simple ambush enemies. Loved it. Then comes the part labeled "Optional" in the Zhentarim camp. I have found this part rarely gets played because of how much time the rest of the module takes, and this would go beyond the 2 hour projected play time. After that is the Sandstorm section. Brilliant way to allow player choice in skill usage, and it (usually) require them to sacrifice SOMETHING, which I think is a good thing. Next comes the Hobgoblin gate. Again, if they choose to fight, I think that with the wall and clever wagon usage, this becomes a very tactical fight. If they choose to bypass this fight, or pay the toll, I like how stacked against the players the following encounter seems to be.
CONCLUSION- Around time for the conclusion, the 2-hour mark is either right upon you, or has passed by a little bit. Doing this makes the 2 NPCs introduced here rather forgettable (Chandra Stoll and Raggnar). I also thought it odd that the characters don't get paid for the weapons/supplies if they already got paid for the statue since those payments come from separate sources. The Bracers of Archery magic item reward are pretty underwhelming as well. They only fit a fairly narrow niche of characters, so I've had it that no one even wanted them at all (and if they did it was more for the weather-resistant effect).