This is among the best animes out there, unless of course you hate mecha animes but even then you may like it.
Its got a good storyline, some nice relationship developments (my fav couple of all time is actually in here) and the fight scenes are good as well. Gundam Seed and Gundam Seed Destiny is a must watch by all!!
Oh and just so you know there is a movie coming out for it set after Destiny, its supose to come out around summer (in between the two halfs of the gundam 00 series).
I actually thought this show was very shallow and mediocre. It's has tons of nice action and a decent story but I'd hardly call it the one of the best or recommend it to every one.
And this is coming from someone who has it down as one of their favorite shows. There is a point where you have to draw the line between being "good" and being "enjoyable. Gundam SEED is a very enjoyable series for those of us who like mecha/sci-fi, but it's not what I would consider "good" in the same way as something like Mushishi or 5 Centimeters per Second.
And about the movie, it was announced back in May of '06 and we haven't heard anything new about it since, so it's still a long ways away. That considering they're still even planing on making it.
And what's this your saying about Gundam 00 reaching the half way mark this summer? It's already 18/25 and will be over in the middle of march. Sorry if I'm somehow misunderstanding.