This book was an important part in my learning of Lisp, along with Common Lisp the Language 2ed. It did leave me with a few biases that took a while to overcome though, like biases against CLOS and verbose names.
I consider this book to be almost like a forerunner of the style of book that JavaScript: the Good Bits is, in that it is advocating one's use of a language to a particular subset rather being an impartial description of the whole language.
Well to be fair I already had that aversion, though I will use that on occasion.
Ironically enough I am an aficionado of the Waters series facility [1], which requires one to write Loop definitions for certain constructs (like defining new producing forms), so my efforts to avoid using Loop led to me using it.
I think Loop doesn't deserve the hate it gets. I don't particularly like it, but I don't dislike it that much.
I consider this book to be almost like a forerunner of the style of book that JavaScript: the Good Bits is, in that it is advocating one's use of a language to a particular subset rather being an impartial description of the whole language.