I booked the same for our trip in August. I also checked out the others and e-mailed them with questions. Marie at Murray Hill Transportation was the only one that responded back to me, they are also a little less expensive. Also a free grocery stop, free car seat for my two year old, and I can rent a stoller from them for the week for $25.00, so I won't need to rent everyday at the parks and since we are staying at CBR, which I heard is a big resort, it may come in handy there also.
www.transportation2disney.com
www.transportation2disney.com