This is a fine work on the Luftwaffe, and it is well-researched, well-written, and worthy of praise. Murray makes his arguments clear and generally supports them effectively, though I have some reservations.
Naturally, there is much debate in history and academia, and there is certainly plenty when it comes to the military of the Third Reich and the Luftwaffe. There are the radicals, those who believe the German military was the greatest in history and only one step down from being infallible, and there are those who claim the German military was beyond inept, corrupt, incompetent, and extremely lucky. As with most things, the radicals paint things as black and white, when in reality things are gray.
I've done quite a lot of research on the Luftwaffe in an academic setting and have produced academic works of my own in the field of the Third Reich's military, and I find that Murray is a little too extreme and harsh in his critiques of the Luftwaffe (and the German military as a whole). Were they doomed for defeat? Possibly, and he makes some sound arguments. Were they as incompetent and ineffective as he claims? Possibly, but the Luftwaffe was also widely regarded in the 1930s and early 1940s as the finest air force on the planet. This was held by the contemporary counterparts of the Luftwaffe on the British and American sides, as well as by 21st century scholarship. There is always room for ineptitude in any organization, as well as room for improvement. However, the modern push by some historians to delegitimize the German military of the Third Reich whenever possible is very difficult to understand, not to mention insulting to the many nations and peoples that were very soundly and convincingly beaten by the alleged ineptitude of the German military. What does that say about Poland, Denmark, Norway, France, the Netherlands, Belgium, Britain, and others, as labels such as incompetent and ineffective are all relative?
Regardless of his slightly extreme opinions, the piece is well-written, thought-provoking, and worth the read for those interested in a deeper, denser dive into the Luftwaffe.