It all depends on where you're trying to go, how fast you want to get there, and how much luggage you have.
The best part of the limo bus is that they load up your bags and drop you right at your hotel. The downside is you could be stuck in traffic.
If you're trying to go straight to Chabad, the train will be easier and Sky Access sounds right.
With a little bit of notice, you can probably arrange delivery with Chabad. It's no uber eats, but still a time savings.