RPG Codex took Ossian's Neverwinter Nights 2: Mysteries of Westgate adventure pack for a spin, and it sounds like they thoroughly enjoyed it. A couple of excerpts:
The design of the ending deserves a special praise. It is - without a doubt - the best and most brilliantly designed ending to ever grace the genre. The evil option is something that every RPG fan should experience. I kid you not. Ossian has significantly raised the bar there.
To put it simply, Mysteries of Westgate is a game worth playing. Ossian Studio has successfully avoided the temptation of telling epic stories and improving dated visuals, and instead focused on the only thing that truly matters in the end - good design. If that's good enough for you, go and spend 10 bucks on the game, sending the developers a message that their efforts are noted and appreciated. If not.