We first saw the EWP in the early 80"s when we were staying at FW and the children were young. At the time I said to my DH it was like "gravy" and it was free. We loved it then, so Disney and magical to us.
We saw it from 'OHana in October while we were eating dinner. It brought back great memories of our first trip to Disney.
I can not disagree with Robo, however. It is an early Disney presentation and a tradition. Since its debut 30ish years ago, Disney has grown and now produces some truly extraordinary events - Wishes, Fantasmic, Spectro, Illuminations. The EWP is not of that caliber. It is interesting and fun with great music, in my opinion.
I would not go way out of my way to see it, but if you are in the area, it is a nice little show. I plan on showing it to DGD and DGS in 2 weeks, as I help to introduce the next generation of my family to Disney Magic. We are staying at the Poly and at 3 and 5 I believe they will enjoy it. DS, their Dad, will share my memory of his first trip to WDW. It will mean a lot to me!
Hope this helps.