My opinion is the opposite of Spiceycats. I just had a vacation there in Nov. I had a night at Wynham DTD before checking in on property at Disney and a night at the Hilton DTD at the end of my vacation.
Wyndham - I was placed in a larger suite type room (even though I bought the room off of priceline) which faced a parking lot. Room was very very very nice. I enjoyed many of the amentities that the hotel provided including the pools, hot tub and ordering dinner in. I didn't hear my neighbors, bought a few items from the souvenir shop and had a really great start to my vacation. The hotel was clean and everything in my room was in good order. Now since I wasn't put in a regular room I can't comment on them, but in my personal opinion, I did prefer this hotel over the Hilton
Don't get me wrong, the Hilton is also a nice hotel. My room was clean and in good order. There was a problem with the door (cut a good 1/2" from the floor) which let in a lot of noise as I had plenty of neighbors who had children. I didn't like the pool area as much as I did at the Wyndham but I did prefer the general food/cafe area here than what was open at the Wyndham (Hilton has more food choices). The other option available at the Hilton is that you can participate in Disney's early entry into whatever park is open on that day. However, as your checking into Disney eventually, you may not want to use that option.
Both hotels are about the same walking distance from DTD which is very convenient. I wouldn't hesitate to spend a night at the Hilton but I wouldn't stay there for a multiple day stay.