Almost perfect. The "smart timing" feature (where it doesn't reload if you're typing text onto a page) is essential, and not supported by any of the other refresh add-ons. Without that, you run the risk of loosing whatever you're typing if a refresh happens at an awkward time. My main complaint is that it forgets everything when you manually reload the tab (or the browser shuts down), so you need to manually re-enable autorefresh on the tabs. Only takes a few seconds, but is annoying nonetheless. I want a permanent connection between certain URLs and reloading, so that whenever I bring up a given site, it will automatically reload.