The first time I watched this when it was released, I was at a con, full of other fans, there were cosplayers, lots of chatting, and I didn't pay much attention. Mostly I remember a lot of cheering whenever Seiya got pounded and having many pictures taken that day. So I did have somewhat fond memories of this movie. Watching it again though... hm.
The animation is probably the best Saint Seiya has ever seen. The mood, set by the beautiful colors, shadows and textures is also something to be praised. The character design is another huge improvement over the original series, and even better than in the Hades Chapter, and overall, these technical aspects make the movie very easy on the eyes. I would say the only flaw there is the soundtrack. Several scenes seemed to demand music in my opinion, but only few had it.
The actual plot though, it was more of the same: Some god wants to harm Earth, Athena sacrifices herself to save it, the Saints fight to save her. Not that we expect anything different, really, but the development on this one is way boring, even worse than the other movies made from the series, and some of it was rather nonsensical. Marin's meeting with her brother was about the most interesting part, but I feel like I wasted my time watching the rest. Meh. Toei wasted money on this one. If only they had made the original series with the same animation quality though...