Been running it since August 2020, average 2 sessions a week with different PC groups. Highest level PCs are now 5th. I use 1 week long rests but 1 hour short rests. which prevents the LR classes dominating play.
I haven't yet really faced the challenge of a PC group being too high level for a starting PC to adventure with, though some 1st level concepts have proven unviable in a group mostly 4th or so - the Fighter-1 PC half-elf who wore only a chain shirt, wielded a greatsword, and liked to take point in assaulting the ogre & orc lair, did not survive to level 2. Player came back with a half-orc Rogue, which worked fine. I think a level 1 axe & shield Barbarian-1 would have been viable, but a melee character with AC 15 & 12 hp was a step too far.