Conrad Fischer Lectures for IM but to be honest he literally hits every point in MTB 2/3 (though it is good hearing it then reading it.)
The Ob/Gyn guy was great.
Surgery lectures are straight from the LN but he goes over all the vignettes so it was well worth it.
I watched 1-2 lectures of all the other subjects and the lecturers were pretty bad in my opinion. I used my Step 1 Kaplan lectures for the Biostats part. Daughtery is amazing, a bit too good, too bad Kaplan lost him to Falcon.
Being at the tail end of my Step 2 Prep I would say the only part of Kaplan that has actually helped me consistently get right answers is Pestana with Surgery and Daughtery with Biostats/Psych. The rest are not needed and is in MTB/UWORLD.