Thanks for all the feedback.
I've spoken to the missus and I think we'll just take the Limo Bus afterall. Based on your experience, should we expect heavy traffic coming into Tokyo at around 4:30 PM on a Wednesday afternoon and would it likely be a 2+ hour commute or do you feel that the listed times on the website are fairly accurate at this time of day? I can live with the 1-hour 50-minute transfer directly to our hotel, but not another 2.5 hours of sitting in cramped seats after such a long haul.
Btw, I don't see how the Tokyo Station bus is serviced any more frequently than The Peninsula:
http://www.limousinebus.co.jp/en/pla...hes/index/2/15
It looks to be approx. every hour as well. Is this not accurate?