I just purchased the FA Basic Science and Organ System book. I took almost a whole day to look through them and here is my impression.
Highlights from the FA Basic Science book:
Beh Science: exactly like FA written out in sentence form.
Biochemistry: very thorough and solid. Not as much detail as Kaplan or RR but extremely well written.
Micro/Immuno: excellent. I just took the Micro/Immuno shelf last semester and I wish this book had been available sooner.
Highlights fromt the FA Organ System book:
For every organ system, it is broken down into a section on embryology, anatomy, physiology, pathology, and pharmacology similar to the format of FA but with more detail and better explanation.
I feel like the embryo and anatomy sections are excellent and sufficient. Perhaps not as much detail as HY or BRS but it is very well written and more clinical oriented.
The physiology section is excellent and covers about 90% of the material in BRS physiology.
Pathology section doesn't cover as much detail as Goljan but probably more info than BRS. It is extremely well wirtten with nice pictures. I feel like it's more helpful for 3rd year because disease is broken down into general description, presentation, diagnoses, treatment, and prognosis.
For the Boards, I think I would still use BRS or Goljan though.
The pharmacology section is excellent but not much different from FA.
In general, I'm very happy with the purchase. Because it's rather thick (>500 pages for Basic Science and >900 pages for Organ System), it's not suited for cramming for the Boards but rather for reviewing during the year. I really like these books because as I follow along my path and pharm class, I can review embryo, anatomy, and physio for that organ system as well.
Negatives: Pharm and Beh Science not much different from FA, some overlapping info btw the Basic Science and Organ System book