We use Tiffany every trip. Used them 5 times last year. Last time was for the October 1st weekend. We like going directly to our hotel, not having to make other stops along the way. And we are always worrying if we’ll be at the airport when we want to for departure. Tiffany is always at least 5-10 minutes early. For us it’s a much more relaxed way to end our vacation.
We had an absolutely horrible experience with a shared shuttle on a trip to
Disneyland many years ago. We’ve used private towncars ever since. That said, the Mears reviews I’ve read have been good so far. If they stay that way, I might consider using them to get to the hotel. But I would still take Tiffany back to the airport.