I'll reiterate my previous comment: I like. I like a LOT.
The adaptation is very true to the manga, though we'll see how true that holds later in the series.
I'm a huge fan of big, bombastic music, so I loved the music here. It reminded me more of Noir than .hack//SIGN, though. I agree with angel that the animation was very good, but not mind-blowing, though the character designs looked like they got stretched coming out of Avenger. It's not a bad look and is true to the manga, but it takes a bit of getting used to.
The voice acting is very good as well, though it also takes some getting used to (especially since I watched the second CCS movie just last night). Shaoran actually took me less getting used to than Sakura did, for some reason. Kurogane's voice does rock, but Fai seems a little too light for his character. We'll see how he sounds later, when he has more lines. The other returning characters are quite good, especially Tomoyo, who sounds exactly like I would expect her to five or ten years after CCS. Touya's and Sohma's are so close to their originals, I'm almost certain they got the original actors back for the roles. And Mokona's voice (who does the preview) is also just great.
One further, possibly spoiler voice wrote:Yuuko's voice is also absolutely excellent. She nails the not-quite-cold, mysterious powerful being voice perfectly. I can't wait to hear Watanuki and Maro/Moro.
Response to angel's spoiler wrote:He's supposed to have that tatoo, remember? It's his magical symbol that becomes his payment to Yuuko.
