No he doesn't. Si Dunn only gives out 4 & 5 star reviews with the vast majority being 5 star. Si Dunn also isn't a programmer, he's a non fiction author and professional book reviewer. He's a shill, his reviews are all the same formulaic BS. He doesn't understand enough about writing code to actually review the book and instead fills space by using author quotes or lists the definitions of what the technology is.