Product review (3 stars): Broke after a few hours, but some electrical hacking kinda fixed it.
Loved the machine so much... until it broke after the first few hours of use. Says "ice full" when tray is empty... and even after the sensors have been cleaned. So now it won't make ice at all. Tried all the troubleshooting tips in the manual.  Tried the reset procedure recommended on some other forums. Didn't work. After more research, though it has many positive reviews, I found many negative reviews of this machine that have similar glitchy problems.
Igloo has leased out their brand name to a company called Curtis, who really makes this machine.
To answer a few questions about it...
It holds the made ice in a small tray about 4 in high x 7 in wide x 4 in deep. It doesn't hold it in a frozen state, but more of an insulated one, like a cooler.
In an hour, I think, ours made a little over two cups of cubes.
I found that I could pour in a little over two quarts of water before I hit the max line.
You can pour through the ice cubes/tray to fill the reservoir, but you can also lift out the tray, even when it's running (as long as it's not dumping), to fill the reservoir cleanly.
It runs on house AC, and is a grounded plug.
Size of ice: ours tends to be about 3/4 in x 3/4 x 3/4. It's cylindrical/bullet-shaped, with one of the ends being rounded, and the other open, like a tiny cup.  The first couple of batches come out much smaller, though.
It says it makes small and large ice, but in our case, the difference is negligible.
The water reservoir is under the ice tray, so any ice that melts just goes right back into the cycle.
It will stop when ice starts to build up to the level of an electric eye just above the tray. Mine, however, broke, after a few hours of use. I spliced together the black and red wires leading to the sensor, so that it always thinks the tray is not full.  We manually control it by either turning it off, or only putting one quart of water in the reservoir.
The way it works is that... a small tray swings down under what we'll call the "freezing fingers".  Then the water pump fills up that tray so that the tips of the fingers are submerged. The compressor kicks on and the fingers gradually freeze the water immediately around them (like a wick dipped in hot wax gathers wax around it).  The ice gets thicker around the fingers, and then the tray swings back out of the way, letting the water fall back into the reservoir, while an ice cube drops from each finger. A bulldozer/blade then moves forward to push the ice into the basket/ice tray.