Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good for a collector or a Forgotten Realms Underdark Campaign

I am trying to collect all of the Forgotten Realms 3.X products, so this was a must have for me. But, I think if you weren't planning a large arc of a campaign in the Underdark, this book would not be for me. If you are a collector or if you want a great Underdark backdrop for your Forgotten Realms campaign, than this book is second to none.