Research Tracking Online

While waiting for a friend to arrive, I spent some time catching up on other teachers blogs. I found a great MLA format handout, which I'll modify a bit (it's a few years old) and use in my research unit. Then, Zotero caught my eye. I have not tried out this research tool; in fact, the link imbedded here is just to the blog (HuffEnglish) where I found out about the tool. However, my interest is piqued, especially in light of my focus on internet tools in my Media Lit. courses. Has anyone tried this tool out? If so, what did you like and dislike?