Rx Express helped me in: Psych, biochem (mostly genetics part), embryo (from beginning of repro chapter) & immuno. Those were sections (psych, embryo, genetics) that I drastically needed quick help in but was not tryna read FA straight up. The vids were quick but gave enough background info to where I could make sense of FA.
I give a special recommendation for the the Rx Psych vids. They were ON POINT, especially the pharm.
No real experience with DIT. I watched a couple neuro DIT vids from a friend but they were not working for me so I stopped after like 30 mins. But I tried those vids like 8 months before dedicated so I wasn't really in the zone.