I'm not too fond of the anime, though I absolutely LOVE the manga right now.
I did however buy the first DVD while I was in America, and upon watching it..I really didn't like the dub very much at all:\ (I haven't seen much of the original Japanese, so I don't think my opinion on it is TOO biased or anything...)
Sakura's voice is too...High pitched(I know it's quite high in the original but I just didn't like her dubbed voice.)? There's something not right about it. Syaoran sounded right enough. KU-RO-GA-NE (Not Kuro-gane. That REALLY annoyed me) was alright aswell, and finally Fai, was awful. Vic Mignogna did a terrible job I thought. Don't get me wrong, I quite liked him as Edward in Fullmetal Alchemist, but his performace in Tsubasa I felt was poor
I didn't really like the quality of the animation at some points (That's a really lousy thing to be put off by, but it's something that gets to me), so it's another reason I haven't watched much.
There is also a movie which was released in unison with xxxHolic I think. It's like an episode, in that it's 30 minutes long (Unless that's the xxxHolic movie, I forget), but I'm sure it's done by a different company and doesn't follow the manga.
There is no season 3 confirmed, I'm pretty sure Bee-Train (The animation company for Tsubasa) dropped it.
But there is a OVA coming out soon of the Acid-Tokyo arc, which I'm sure, if there was a season 3, would have been part of.
I'm REALLY looking forward to the OVA myself. The artwork looks great so far, and Acid-Tokyo was one of my favourite worlds for all that happened there.