My husband loved it!
He says: This was easily my best Birthday gift this year, or in quite some time. My wife arranged it so that the first package would show up about a month BEFORE my birthday, with the others leading up to the date, which allowed me to essentially have a present that lasted for the whole month--which made the whole experience way more fun. :)
The overall "mystery" of this thing was great, with the first package providing no real context and really just coming off as a mistaken delivery out of the blue. Every single thing that shows up feels legitimate, with each newspaper clipping and artifact carefully made to look and feel real, and everything 100% committed to the fiction--nothing ever feels like "here's a manufactured puzzle for you to solve," but it's all so earnest and well researched enough to feel solid and believable. It's also secretive enough that you can safely use internet research to learn more about the real-world clues without accidentally stumbling across the solution to the puzzles.
I found the puzzles themselves a ton of fun to solve and satisfying when you figure them out, and the narrative that you unveil over the course of the different packages equally satisfying. The whole thing actually made me wish for a "sequel" treasure hunt that would narratively link to this one.
Just one tip for people thinking about buying this: In the final delivery there is a large envelope labeled "OPEN THIS LAST." When they say "last," they don't mean "after you've opened…