Limo bus is more convenient if it stops directly at your hotel. Depending on how far it stops and how much you have to walk, how much luggage and children / old people you travelling with.
I'm staying at this hotel that says take limousine bus to Tokyo station, then 10 minutes by Taxi. Previously tried that and was still quite a hassle transferring from Limo bus to Taxi, with very heavy and big luggage. Will try all train this time, with small luggage, though train means 3 transfers, but this time from HND instead of NRT. Chose this hotel again as I know luggage will be much smaller this time.
Do try to get a hotel that the limo bus stops at, if you really want hassle free.