I'm interested in what people feel about it too. I'll give my two cents even though I'm only several days into 5 wks of study. I am using UWorld, Kaplan HY CK lectures, and was using Master the Boards at first.
I got First Aid for CK before rotations and read the Peds, OB/GYN, Psych, and Neuro sections during rotations. I liked it as a rotations outline well enough.
But when I heard residents and upperclassmen raving about Master The Boards, I bought it. It goes perfectly with the Kaplan HY lectures program that I bought (on a huuuuuge sale 😀) and it goes perfectly with the lectures. I like the book a lot for its high yield points of first steps, most accurate, empiric therapy - but it is almost ONLY just high yield points. After doing half of the ID chapter and annotating with UWorld info, I realized that there are many details that MTB is completely lacking. I was writing in tons of key details. For example, it gives a one-liner about the top organisms responsible for meningitis and % of cases, but not divided by age or risk factors. I want details...just not excessive details.
I then tried to use Step Up to Medicine for the IM parts, but was overwhelmed with the amount of details (as someone said it really is more detailed than even the shelf exam required, for which I used MKSAP). I looked at a friend's StepUpToStep2, which I liked for its organization, but she was unhappy that it was somewhat incomplete in having too little info on "next steps" and "best" tests in a lot of places. Those are important for me to be reminded each time I look at a topic.
I finally just went back to FA today and will let you know how I feel about it after a few days. At the very least, the visual organization is better than MTB, which looked much less "neatly" structured. And I'll be reviewing what I've already read too.
I told myself I'd pick something and stick with it, but I'm just not happy enough with the light-weight MTB.