Viper Pilot is a fantastic book that tells you about the actual lifestyle of an F-16 pilot through the eyes of one. While it is filled with some technical information about operating the F-16, it is mostly "seen" through the lens of someone who already understands the systems and is just employing them (the Pilot).
If you want to understand the most important part of any aircraft (the pilot), and the cultural and lifestyle of fighter pilots of the time period (late 80s-2000's), then Viper Pilot is a must-have. If you want a technical book, and you don't care about the above information then get the Modern Viper Guide 2nd Edition.
Viper Pilot is a great book, people who think it's "trash" must not just care about the story of what it's actually like to be a fighter pilot. Of course, that's fine, but the book is definitely not bad at all because it's not what certain people are looking for.