I've been a Footnote.com subscriber for awhile now, but hadn't really spent a lot of time with it until recently. When I first started with it, it seemed to have a lot of fairly obscure documents, such as the city council minutes of South Boston, Virginia. Frankly, what brought me back to explore it again was a series of interesting posts by Miriam Midkiff at Ancestories in which the stories she told were tied to documents on Footnote.com.
Now I'm quite a bit more impressed. Partnerships with the National Archives and FamilySearch have brought a number of interesting documents and photographs to Footnote.com. The American Milestone Documents collection, for example, is just what the name suggests: important documents in American history. And there are a number of military records.
I like the fact that for each finite set of documents, Footnote indicates what percentage of the set is currently available.
More purely genealogical documents are available now. In the 16% complete Texas Death Certificates collection, I found two death certificates that I'd been unable to find elsewhere for several years. One of these I had thought did not exist.
Navigation could use some improvement, but otherwise, the technical aspects of the site are in the "superior" category.
I'm visiting Footnote.com often just to browse the interesting documents.
Recommendation: A "must visit."