What I liked most about this travel guide was the way it efficiently highlighted both the popular spots and the hidden gems. That's what a travel guide is supposed to do, but some do it better than others. This book is compact, so it went with us everywhere: Glacier NP, Yellowstone NP, Billings, Bozeman, Butte, Flathead Lake, Missoula, Traveler's Rest, Jerry Johnson Hot Springs, the Bitterroot Valley, Bannack, Virginia City, and a lot of highway. Another big plus was finding the same text for each entry in the book also on the Moon website. Being off the grid much of the time but then alternatively nestled in a comfy hotel room with Wi-Fi, it was convenient to have both options. I like the format of the Moon guide, with top highlights for each region, followed by plenty of details about each place within the regions. The only part that quickly gets out of date is the coverage of restaurants. I would use the guide to find interesting spots, but stick with TripAdvisor to confirm recent ratings or just to find a good choice more customized to the immediate need. A few of the restaurants we'd planned to dine at based on the Moon guide were no longer in business, and others were rated very poorly compared to others. ( )