Only worked through a part of it, but left a pretty good impression. Writing style was pleasant to read, sometimes imagined it read in Bob Ross' voice. Only Scratch has a shorter "zero to moving pictures" time. The language manual is so tightly integrated with the book it doesn't leave a single character of code unexplained (I've read beginner's books that never explained "+=" while using it in code samples). My only nitpick is that the design recipe wasn't sufficiently explained and it finally clicked when I tried the edx course based on the first part of HtDP, which has its own problems like a plodding pace and unchallenging excercises. All in all a great beginner's book.