I visited Whistler without this book back in 2004 and found it to be rather overwhelming. I had no resources other than the trail map and the occasional recommendation to the ever-popular "7th Heaven" and "Burnt Stew Trail". Those are great but now I see how much great terrain I missed out on. With a planned trip coming up in February 2011, I am thrilled to have this book in hand already. I can see how it is literally going to improve my trip 10 fold. I keep the books (I also have the Advanced/Expert Edition) on my bedside table and enjoy glancing through them before going to bed. I feel like I know the resort very well and I know exactly where I want to go when I get there!
One thing I wish the book did a better job of is recommendations for different weather situations (i.e. "if it's sunny, go straight to 7th Heaven" or "If you missed the fresh stuff at _____ in the early morning, head over to ______ , as it doesn't get tracked up as quickly" or "if it's windy, find relief at ______"). The layout of the book is a little difficult to follow, as the trail map does not take into account some of the topography and ridge lines. One more thing I'd like to see is a "Top 10 Runs" or something similar. (The Advanced/Expert Edition has this section included).
All in all, I see this being the best $20 investment anyone could make for their first (or return) trip to Whistler. Although a little outdated, this is certainly the definitive printed resource for the Whistler skier or snowboarder. A must have, in my opinion.