I tested it out with a bit of water and it did shut off automatically, but without instructions I'll have to try the various water levels, presuming that's what the lid is for, and see which one turns out eggs the way I like them.
I have a stove-top poacher, but up until now didn't own a specialty item that cooks the eggs in their shells and automatically shuts itself off. If this thing works to my satisfaction, I'll probably use it instead of boiling in a saucepan full of water. Another water-saving measure during this drought period, although the 550 watts will probably cost me more in electricity than the penalty rates for a quart's worth of water. It's too bad it doesn't provide a signal when the eggs are done, but in most cases it's only a matter of a few minutes and it does make a click when the it switches itself back to the "OFF" position.
If anyone has experience with one of these units, I'd appreciate your input.