Product review (4 stars): If it doesn't work, replace it.
I bought one as a present for my dad, who would have to make ice manually. The first machine we received would not work; it was not cold enough for the machine to make ice. I'm no expert in tinkering, so I just requested a replacement.

The second machine works perfectly as described. Ice is being made, and my dad is excited every morning to turn it on. Thank you Amazon for your speedy replacement!