I advise people not to apply ED, unless
a) the school is their clear #1 choice after careful comparisons with other potential schools; and
b) financial consideration is relatively unimportant.
ED generally does give you a better admission boost than EA or SCEA/REA, but you also give up a lot for that boost. The schools that only offer EA or SCEA tend to be more attractive both academically and financially for most top applicants.