I was late to this one, on a long weekender in Bruges, where I learned that, beautiful as the city is, the police have a quixotic reading of the parking regulations. So for once i wasn't "in the weekly scramble to see who can be first to comment on the Listener" -though I never comment unless I've finished.
I don't think this was one I could have completed on a Friday evening - even Midozolam missed out by 17 minutes!. Smashing concept, brilliantly constructed, great clues: I think it takes a particular ingenuity to clue nonsense words unambiguously as Kea did.
The final result is awesome: I can't begin to work out how you put it together in the first place. I found the final steps easier than I expected: there was a logic to the process helped by the quote.
And yes, I fell into the tease of thinking I'd solved the whole puzzle because I'd guessed quote and author (well, got them from google, like you do) very early on.
Put me in the "what a cracker" camp.