There’s nothing new here, and if you read a lot of productivity or self-improvement books, you won’t get much from it. But if you don’t, and you need to pick one, this would be a good one.
The gimmick is that this guy spent one year of his life performing every hack he could think of to improve his productivity, and this book is the result.
For that purpose, it’s not a bad book. But he’s not breaking any new ground.