I had it done to me, and so far it seems okay.
The o-ring on the VCT solenoid on bank 1 was leaking so I asked the dealer to change in and the VCG on that side. (This was at a little over 100K miles.) When I picked it up, they only changed the VCT o-ring and reused the VCG. I am still a little annoyed. I've now seen some slight seeping of oil in the #3 well, but not enough to pool and reach the spark plug.