Is it any good? I felt the text was well organized but, as you might expect, the topic was greatly oversimplified. My guess is that much of the information came from one person’s limited experience. For example, step #4, “Call for help on the radio,” tells you to ”Look for a hand-held microphone, which is normally to the left of the pilot’s seat just below the side window, and use it like a CB radio.” The handheld mics I’ve seen to the left of the pilot’s seat usually are in a storage pouch on the door, often buried under the POH, not even plugged into the aircraft.
Comments can be found on the wiki’s “Discussion” tab and there was a lot of speculation as to whether somebody without at least some piloting experience would have any hope of landing an airliner. Frankly, I think a lot of that is academic; today, if both pilots of an airliner are stricken, it’s unlikely that any passenger would be able to breach the hardened cockpit door.