I found the other adventures in this series to be disappointing, but this one here is the gem of the collection. It's a very good introductory Eberron adventure that does a fine job setting the tone for a Sharn-based campaign. Well-written, well-plotted, with plenty for the players to do. And I appreciate the homage to the Forgotten Forge, the very first Eberron adventure. If you're not running the whole Embers of the Last War, you should be able to change the letter to some other MacGuffin that's more relevant for you. If you are running Embers of the Last War, skip the prequel adventure and start here.
What holds it back from 5 stars is the editing and formatting. The adventure layout is kinda confusing, and you'll be flipping back and forth a lot. Information about characters and locations is split up between the appendices and the scenes they appear in, and the scenes aren't presented in chronological order. There's also a dearth of box text, which means you have to improvise descriptions. These sorts of inconveniences all add up to make the adventure more difficult to run. Expect to spend more prep time than usual making up for the shortcomings.
[4 of 5 Stars!]