In May 2002 my DW and I stayed at WL and booked concierge with our package. Randall contacted us prior to our arrival and did lots of pre-arrival planning.
In Nov. we stayed at the BC and paid for a standard room, non-concierge. We were surprised with an upgrade to concierge upon arrival (we never found out why that happened -- but I'm not one to look a gift horse in the mouth!). We had made most of our PS ourselves, but the concierge staff were great at helping with last minute changes.
As for being worth it -- the answer will vary by individual. We really enjoyed the lounge, the snacks, having breakfast there. However, we probably did not utilize it enough to balance the overall cost (well, maybe except for the BC which was "free.") Even so, we'd probably reserve & pay for it on our next trip because we had a couple of wonderful experiences.