My only experience with BF Concierge is:

After boarding and settled into the seats, one lady approached us with manifest on her hands, "Mr. PforPlatinum and Mr. PforPlatinum Jr.? Thank you for flying with us today. Do you have connection at NRT? Are there anything we can help at arrival?"
I thought we were greeted because both were Elite (Gold at that time), but now I think it must be a Concierge.

As I usually fly between IAH and NRT without connection, and hotel is always reserved at Tokyo (or as coming back home in Houston) I don't need to take shower at the airport. So I don't feel I can take much advantage of having BF Concierge, but PAX with connection would be different.