Received mine today (4.25") from Bullseye North after 10 weeks from the date of purchase.
The 2020 Python is exceptionally well built. I've owned a Smith and Wesson 27-2, a Ruger GP100, a Chiappa Rhino, and a Manurhin MR88. The Python is definitely feels the most well put together of them all, with a shout out to the 27-2 for being quite close actually.
I find the DA trigger pull to be really quite smooth. The SA trigger is surprisingly heavy, also with more travel before the break than I was expecting. My 27-2 had a better trigger. But the Python wins on ergonomics and style. I also swapped out the grip for the Pachmayr gripper grips. The stock ones were quite large. Also swapped out the front sight and installed a YELLOW fiber optic. Looks and feels exceptional. Can't wait to take it to the range!