Neon Genesis is an awesome TV series. I loved it when I was younger, and I just recently re-watched it as a trip down memory lane.
The last episode is pretty nutty and out there as well.
I actually have a mini figure of "Sachiel" one of the Angels on the dashboard of my car.
That video has clips from one or both of the two movie-type length endings for Evangelion called "Death And Rebirth" which is basically a recap of the series in the first half, and a new episode ending in the last half, and "End Of Evangelion" the movie-ish length movie.
After watching the series and not seeing these 'ending' movies [since they never screened on TV until recently] I was understandably pretty annoyed, but after watching, and being a big fan of the series for so long, well I suppose that makes it all the more important and entertaining for me.
It's more than just a giant robot kicks crap out of things series, which is why I think it's great!