I did. Wasn't mine, I'm actually looking at buying one right now.
They're expensive for what they are.
I've asked a mate of mine to see if he can make me one.
Review of the actual dragonfly: it's ok.
Ideally the first clean would be trad then maintenance cleans with Dragonfly.
You'd get through about a million pads on a first clean with it.
Rougher pads, loads of water to start then finer (microfiber?) pad to buff it up.
Good thing is that once the glass is clean it tends to stay clean as it's up so high there are only fly's (flies?) mess and dust on it.
No finger marks etc...
If you're considering getting one I'd assume you have a job to warrant it.
Don't just buy one to add to you're arsenal.