Nothing first hand but I was at the battery store yesterday. They said they used to be good until they started making them in Mexico.
FWIW I walked out with a Trojan 31 AGM. My old Trojan 31 acid is going in the boat!!
'17 Class C 22' Conquest on Ford E 450 with V 10. 4000 Onan, Quad 6 volt AGMs, 515 watts solar.
'12 Northstar Liberty on a '16 Super Duty 6.2. Twin 6 volt AGMs with 300 watts solar.