Got into NRT T2 at about 20.20 off CX500 on Saturday night and just missed the 20.44 N'EX. Staying at the Conrad in Shiodome; so had long since missed the last Limousine Bus. The choices were either wait for the 21.12 Skyliner to Ueno plus probably a ¥3,000 cab fare or take the Access Narita bus.
Did the latter, took a cab from Ginza to the hotel: total of about ¥1,800 and probably about the same journey time (with less hauling around of suitcases).