I've also been curious about how Mears is from a Disney resort to Universal Orlando. With our trip, we are planning on going to Universal two days, and Mears is really our only option unless we fork out money for a taxi. One day of this is for Halloween Horror Nights, and from my understanding, some towncars don't travel that late.
I think what we'll do is try Mears for our first trip to Universal, and if we don't like it, we'll just spend the money on a taxi for our second trip.