The detail is ideal, a quick read has your players ready in a hurry.
The example dungeon has enough detail to keep a complete newbie DM on track (which i am...) while having enough gaps left to fill that i can see as my improv improves, the game will stay interesting and relevant!
I truly believe this product could stand as a product even if all it had was that example dungeon...
But the fast-tracked learning nature of the rest of this book takes it well beyond expectations.
[5 of 5 Stars!]