I just watched it, so far I'm really liking this series. I was afraid it was going to go down similar paths as some other mecha anime *cough*GundamSEED*cough* (with good reason, heck, they're from the same producers) Even thuogh CLAMP is behind the character design, there is quite a few resemblence to characters in Gundam SEED; in appearance and personality. When Lelouch and Suzaku was fighting, I had flashbacks to Kira and Athrun. But it turned out a lot different, and that's good.
As said before, if this keeps up it'll definately be a very good series.