Disney buses do not pick up at these hotels. However, they offer their own transportation which is probably better than most non Disney hotels.
Disney Dining is not available at DTD hotels.
Free parking is offered at the hotels themselves, but not at the theme parks.
We have stayed at several of the DTD hotels, Buena Vista Palace, Marriott Courtyard (now closed for renovations), Hotel Royal Plaza and Doubletree Suites. We have always enjoyed our stay. You can't beat the location, walking distance to DTD and Crossroads. Plus the complimentary transportation is clean, comfortable and usually on time.