Eric, sorry I wasn't logged in when I replied to the previous post!

What I meant to say is that there are two types of private transfers...one where you are the only party being transported, and another that is shared...you may be one party in a group of people being transported south, with stops along the way at whatever resort the others are staying at. The vendor organizes the trip, but it is different than the scheduled public transport. Tulum is the "end of the line" so if you opt for a shared private transport, it could take longer than a solo private transfer.