The three day London Pass certainly helped plenty on my trip. The book they send you is a very useful resource, and it got me into a lot of the bigger things and helped me pilot on what turned out to be an "On the Fly" vacation. But I think if one sits down before the trip and plans it out better, they can get even more out of this device.
I only had two "reservations" 1. the organization can be difficult to find some thing that's still open as you get to the end of the day. I suggested to them they add a second table of contents by closing/last-tour time to help. 2. It runs on a "Calander Clock" not a 24 hour clock. (i.e. changes over at midnight, not the first hour you scan it.)
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