If you have very oily skin, large pores, or Rosacea, then there is a strong possibility that the Microbladed hair strokes will not retain their definition once healed and the effect will be more of a powder brow look and in some cases, the pigment will heal to a very cool tone.
For oily skin Justine recommends either a combo brow with shading to give more of a powder brow look straight away, or a full powder brow.  This retains much better over time.