I used a TA this trip (October) because we need three rooms, and I did not want to have to deal with having to apply potential discounts to all three rooms myself. She put in our room requests and made our Magical Express ressies. We actually got a small room discount from the agency itself (which may be the only one we get, given how many resorts are booked solid for our dates). I did our park reservations and will do our ADRs. She is very responsive, and I will use her again.