I have had much experience and involvement with the Walk to Emmaus.
The Walk to Emmaus is the de-Romanized version of the RC Cursillo movement. It is not new age, but a 72 hour structured spiritual retreat which focuses on 15 talks (10 by lay people, 5 by clergy) and is intended to be a mini-theological course for church leadership. It usually has a conservative evangelical bent.
Most people return from the retreat very enthusiastic, but that enthusiasm soon fades.
The major, and I emphasize MAJOR problem with it is that it is 100% Arminian in all areas of the retreat.