I'm in the phloston camp, and going to say BRS phys is **** for board review. As is all the other BRS series.
1. BRS phys was good for intro questions during phys class, but the reading wasn't as good as big castanzo
2. Having done all the questions again recently, I can't even recommend it as a go to source as the questions because they are either too easy "What valves open during systole" or just completely non-usmle style questions.
3. The only people I've seen happy with adding this monster to their review are the people that remember exactly nothing in physio/never annotated their first aid during physio (mistake), and they are like "oh thats how the heart works, that makes sense now!"
I'm sure for most of you SDN people, reading again that ACh is released in the NMJ is not going to be revolutionary, or give you any actual edge.
Do phys questions, think of it as directed study, if their is something you don't recall goto first aid, or look it up on the internet.