i have fitted a few sets to customers cars, VK - VL commos ,
the idea seems ok , harder to get something in to turn,
but check if you can get ones to suit your specific model ( XF falcon ) as the one i have fitted have been the universial fit type ( customers supplied their own parts ) and the fit was pretty dodgy in the commodores.( might be made for jap cars ??) .
if i could not get better fitting ones i would give them a miss.
A QUICK TIP .... see if you can find some inside lock grips ( the ones in the top of the door trim ) that DONT have a nob on the top ..
........makes it harder to pull them up with a wire or tape .