Two words of caution booking Good Neighbor though Disney...
1) You are subject to the package cancellation terms which can be much more restrictive then booking direct should something unexpectedly come up.
2) Many have reported finding deals and/or cheaper rooms booking direct vs the package for the same room and same dates...so do your homework.
Not sure what other perks they are offering with packages but know all the Good Neighbor Hotels are just third party properties that Disney has a booking agreement with...but other than that there is zero Disney affiliation.