You shared a research project that required IRB approval. What

 You shared a research project that required IRB approval.  What have you learned from reviewing this research effort?  From reviewing IRB processes, what aspects of the approval process do you feel is most essential to understand and follow?  How can this be challenging?  What experience have you had in the past with IRB approvals or research using human subjects?  What steps were followed and did you see any gaps or risks to the human subjects?  Was there fair treatment involved?