I read it 20 years ago and am still activity using its observations about how we take in, process and give out that which we learn / know to help me navigate today's world. I will use it as a kick-off for a 10 month course on "You and Your Brain'. There are other ways to go. Other ways that are perhaps more recent in research ~~ but Gregorc's work is spot on and very non-threatening and a great way to begin.