This is all assumes of course that the robots flying the plane do exactly with the RA tells them to do. This is where judgement takes precident over a box.Your right in the coffin corner, do you climb because the RA tells you to? Your on approach at the MDA, IMC, do you decend because the RA tells you too? Your VMC right below the clouds on a visual approach...do you climb into the soup because the RA tells you to? I bought a TCAS I unit and chose not to go TCAS II for the extra $100k...I figured, the pilot should know when to climb or descend.