With a party of 10, one of the Towncar services would be much better than Mears.
We took a Tiffany Towncar van to Universal twice on our trip in September of 2004. It was approximately $70 RT plus tip. It was personalized service only for us.
With Mears at $14 pp that would be $140 plus you don't get a pickup time of your choice and you will stop at many resorts both directions.
For one or two people, Mears is the best for Universal Transfers, but when you have 5 or more people, a Town Car is more reasonable.
Carol