I'm probably overly biased in my rating because it's my first non-fiction book in a long time but I thought the concept was so mind-boggling and cool! 
 On a random note, I thought the best example illustrating the Tipping Point concept was in the endnotes about the hypothetical outbreak of flu, where '50' served as a tipping point. I would type the entire thing out here but that's 1. time-consuming and 2. probably illegal. 
 I thought each chapter was very well explained, though combining those factors at the end and illustrating everything with an example couldn't have been easy (nor was it very well done). But I learnt a lot of interesting concepts and ideas anyway - and looking at the endnotes, I would never have read those books individually so kudos to this book for bringing them all together.