Been training this way for a month or two now, after seeing a Jack Reape tip advertising this. I lift Monday, Tuesday, Thursday, Friday, with the first and third days upper body push and the second and fourth lower body and upper body pull. So have been doing horizontal lat work on Mondays and Thursdays, and pullups or similar on Tuesdays and Fridays.
Seems to be working OK, but my lats are sore a lot, wondering if I’d benefit more from more exercises and volume, but less often? Main goals here are increasing pullups and increasing my bench (lats as the “raw bench shirt”).