For those who have seen the Seikai series, Seikai no Senki Special Edition is basically Seikai no Senki, summarised, and just as worthy addition to your anime collection.
And for those who haven't seen the whole series but would like to dive straight in without committing 5 hours into the series, Seikai no Senki Special Edition is perfect for you.
For the uninitiated, Seikai no Senki is about the adventures of an Abh princess Lafiel and her childhood friend, Jinto. The story takes place in the future, when Man has genetically engineered a species of humans specially suited for space-faring - the Abh. But the Abh eventually rebelled and broke away from Man, forming their own empire. Jinto and Lafiel meet again in the Abh star forces just before the start of a war that has been already threatening to erupt for years...
Seikai no Senki is a rather recent series, and as such, the animation is first-rate, as expected. Battles are done with attention to detail, and do not rely on 3D animation which tends to be rather jarring when used badly. Planets and starscapes are drawn beautifully, since that is what the viewer will be seeing most of the time.
Character designs are pleasing to the eye, unless you are one of those fussy types. It is kept simple (no painstakingly drawn strand-by-strand hair here), but with enough detail to draw you in. Designs are unique, so you do not feel two chracters come from the same mould. Because all of the Abh have blue hair, the "different hair color to differentiate chracters" trick does not work and thus thankfully is not used. There is good variety here - even minor supporting chracters are given individuality via little nuances; a holding of hands here, a smile there - you feel each of them have a story behind them.
The soundtrack comprises of orchestra pieces and majestic classical-tending music. Thankfully, it's not corny and ridiculously overused in the Star Wars fashion. The music changes to fit the mood of the various settings, and the resulting ambience is very nice. Rather than taking centre-stage, the soundtrack seeks to complement the show - sometimes you don't realise it's there because of its background role. It draws you into tense scenes, brings across one's sorrow, and then slowly lets you settle back into a more relaxed state. That is the beauty of the music in Seikai no Senki.
Even though earlier knowledge of the series does help, it has no impact on the story progression. Unlike many anime, there are no obvious loopholes. (Of course, you could pick on the high-tech sci-fci gizmos, but that's why it's fiction, no?) Seikai no Senki does not pretend to be hopelessly deep, profound and convoluted. Yet, it manages not to fall into the "B-grade" anime category, by putting in lots of meaningful dialogue. Interspersed between them are enough action scenes to keep you riveted to your seat. More of the action takes place on board the ship's bridge, where tension can be better felt. It is more than typical fluff. There are no horribly cliched happy endings, nor miraculous resolutions to problems. It does not make you cry all the time, too. A good balance that is notoriously hard to find in films today, especially with all the over-hyped psycho-babble that makes you think too much.
The character development is done well...characters are fleshed out in many ways. My only complaint is that there is no way you can develop characters enough in 2 hours - even in the 13-episode version, potential sidelines are not explored fully, so what more in a condensed version?
The conclusion: Whether or not you have not seen the prequels, Seikai no Monshou/Danshou, watch Seikai no Senki. I would recommend that you watch the 13-episode TV series, though - 5 hours is digestable, and offers a more riveting storyline, plus more in-depth chracter development. But that said, Seikai no Senki Special Ed has managed to bring out the best in the TV series, and is already pretty formidable on its own.
If you have already watched the TV series, and would like to re-live and enjoy it all over again, this one is for you, too.