I watched the anime of this first. And then I loved it so much I bought it. Then I had to read the manga. It was so amazingly worth it. The manga goes further than the anime which is great because they weren't entirely a couple at the end of the anime and I really wanted them to be. The manga continues their fight for supremacy while also developing their relationship. The humor is great, funny and adorable in one. The characters are frustrating and lovable all in one. This is a story that'll make you want to pull your hair out, hold your stomach because of laughing to hard, and shout in frustration while crying from laughing. It worth the read.
I've always been a fan of SA and I was SO SO SO SO SO happy to see some omake :') Basically it's a 7-chapter (1 volume) compilation of extras. Completely worth it for SAddicts like me. I would definitely recommend. And if you haven't read Special A yet, please give it a shot! It's one of the best shojo manga ever :)!