I would also checkout Tiffany Towncar.
Up to five passengers ride in a Lincoln Towncar (not corralled in a Mears shuttle bus!). It's $80 R/T to Disney resort ($85 for MK resorts) and there is a $5 coupon at their site.
Haven't used them yet, but will be giving them a try on an upcoming trip.
Hope this was helpful.
P.S. Mears is less expensive ($76) because they do not charge for the 2yo, however, as I mentioned above, you're in a shuttle bus/van (seatbelts?)and the 2yo must sit on your lap. On top of having to wait will until they group all their passengers and load everyone's luggage, they will most likely stop at other hotels before yours to drop off other passengers. I have used Mears a few times and it not the most pleasant way to start your vacation.