Just finished watching the raw (d/l'ed from a bot... so much faster than BT ) and the animation is similar to the Gaara vs. Lee fight (same animators), so pretty good. The fight overall was done well too, although not as good as in the manga IMO. They also added some stuff in the anime, also similar to the Gaara vs. Lee fight. I also believe the whole double episode covered 4 chapters (not sure I didn't check) as well.

Now I'm just patiently waiting for all the upcoming battles (too bad no Naruto next week though).