Product review (5 stars): It is AMAZING. I've owned three other portable ice makers and ...
Dude....this thing makes its first batch of ice within 5 minutes of being turned on.  It is AMAZING.  I've owned three other portable ice makers and this one has them all beat with initial output.  I don't have to leave it plugged in 24/7, I can just turn it on as needed.

The one issue I've had with it is that the ice dump into the tray tends to cause the ice to build up right in front of the sensor, so sometimes you get half a bucket of ice instead of a full bucket.  In those cases you just clear the ice and wait 5 minutes and you have a fresh batch of ice.  To fill the entire basket takes roughly half an hour.  I would absolutely recommend this product.