I won't prefer Keyword Approch, please check below points.

?The Keyword driven approach was difficult to understand 
for any new person who is introduced to QTP.
?The approach did not utilize QTP resources effectively, 
like we were not referring to the actual names of the 
object in the script but in the datatable. This meant if we 
changed an object name in the repository we had to change 
it in the datatable as well, which otherwise is not 
required.