To rec. or to not rec.

<p>I have heard from many people that supplemental recommendations can sometimes harm you, but the director of volunteers wrote me a fantastic letter, considering that I have volunteered under her for 5 years and was Volunteer of the Year. The colleges I'm applying to are:
Columbia, Northwestern, USC, UM, UF, BU, GW, and NYU.
I feel that this letter speaks a lot about me, service-wise, but I'm not sure whether or not I should send it in to these colleges. Opinions? Thanks!</p>