So far, Front-end Editor is working as I had hoped. I use it on fairly vanilla sites, and I really only have it enabled to edit page content and page titles, providing access to a limited number of editors. I did have some widget compatibility issues, but I don't use it to edit widgets anymore, so it's a non-issue.
I'd love to see table editing functions added to the editor. Sometimes, I just need to create some simple tables, and this would be SO handy. Currently, I just hack the HTML using the HTML button in the editor, but it is a workaround at best.