Yay, somebody posted here!!!!
Treating the leather really depends on you and your climate. BTW - Choo does not recommend any treatment. Some of us do use a protectant on our bags. I am not the most careful and I live in a wet climate. I have treated most of my bags with AppleGarde leather/suede protectant. This product cannot be used on patent, nubuck, or exotics.
I wipe the spray off the metal hardware immediately and then let the bag dry in either the shade, or indoors.
Hopefully some others will comment.