I’m not saying that Smyth’s Greek Grammar is a *really* good book, but put it this way: If I was stranded on a desert island and I could only bring one Greek resource period, lexicon, grammar, text book, whatever, I would bring Smyth’s Greek Grammar and I would pray to the Lord God that I might never be rescued. Smyth is that good.
One needs a list of Greek grammars like one needs a list of great Civil War Presidents. I would say of Smyth, R.A.F., what Churchhill said of your namesake, the Royal Air Force: "Never have so many owed so much to a book written by one guy with so few fine words."
τὸν Σιδηρέα φιλῶ.