I think it is great! My ownly grief is, while scrolling in the accordion, I loose the minimize btn at the top... perhaps make those titles and + / - btns sticky? So if you have an abundance of sidebar content, a user may easily minimize that information once more. I also noticed you have categories, yet no category tags on your Article Details page... I think this would be pretty useful for your users to click through to the entire category from here, and it would make browsing a bit more smooth. So far, it looks really great from a UI perspective!