The book did a great job describing and the hikes, what to bring, and what to encounter, however the estimated times for the hikes seemed to be a bit off. For example "Angels Landing" which is one of the most popular hikes in Zion is said to take only two hours. My friend and I literally ran to the top of it and back, taking 1 hour and 30 minutes, passing lots of people along the way. When looking at other sources for the duration of hiking times, they gave the same hike 4 to 5 hours. So to sum it up, the book give great advice on the hikes in Zion, just plan on them taking longer than the estimated time.