My family used Southeast into Sanford last week. Flight was fine, plane was clean, airport was easy. The ride from Sanford to Disney is just under an hour. They used Tifffany Towncar ($160 r/t plus tip).
I did last month, it was all fine except for snow storm with left in but Sanford airport is noce and clean, rental cars are not a problem at all and the drive to WDW is a breeze.