Where did you hear that MEARS has towncars? that must be new. It may be their way of breaking into the towncar market share, since the MEARS vans and buses do a mass pickup at a number of resorts, maybe people aren't using them as much.
I guess if it was a one-family towncar, you could pick your drop off and pick up times just like any other. I'd want to doublecheck and make sure it isn't a multi passenger van. Then you'd be in the soup again with drive times and waiting for all the other pickups/drop offs. We did MEARS our first trip years ago thinking it would be the beginning of the WDW magic--soooooo wrong. It's been towncars and limos for us since.
Where did you hear that MEARS has towncars? that must be new. It may be their way of breaking into the towncar market share, since the MEARS vans and buses do a mass pickup at a number of resorts, maybe people aren't using them as much.