Only caught a few episodes of the first season of Shakugan no Shana but managed to watch the movie that recently came out on DVD.
The second season starts off going through who all the characters are and their relationships with each other. Much of the show is a recap of the first season which is great for those who dont know anything about Shana. As usual, I'm pretty crap at explaining plots so AnimeBlog Ga Arimasu will do it for you. My observations below.
Extremely well animated - love this style of animation.
Cute girls galore - Shana is just too scrumptious.
Nice mix of sorcery, school, sword action and moe characters.
Did I mention Shana looked as great as ever?
OP and ED below and you can watch the whole episode at AriaAnime.