Product review (5 stars): So far, so good
I bought this Luma Ice Maker about 2 months ago, and really like it.  I hope that it continues to work, as many reviews say that they break within one year.  It is the only machine I could find which makes crystal clear ice. (I use brita filtered water).  The ice does not melt as fast as "regular" ice which has air frozen inside it.

Some insights / tips:
-- When you unpack it, set it up where you want it, and leave it alone overnight before you use it.  This will allow the coolant to settle.
-- Push the start button and hold down for 1 second before you let go. Also do this to turn it off.
-- Start with by pouring cold water into the bottom. It will make ice faster.  Then add water in the top.
--  When the last batch is done, and the water light comes on, add a little bit of water to the bottom, which has very cold water in it, so that the float comes up a bit. This will make one more batch and not waste that cold water in the bottom.
-- Very important, when you want to clean it, instead of using water as stated above when the add water light comes on, add vinegar directly to the bottom until it comes on again, and let it run the vinegar/water through the system for 15 minutes.  It will not have made ice yet, and I find that after letting the machine dry out, the first batch the next time has no vinegar taste whatsoever.
-- I always drain the extra water from the machine after making the last bonus batch of ice.  There is a drain plug on the back.  I have mine set up on the edge of the table so that I can open the drain easily.

I find that the first batch takes longer, and then each batch takes 18-20 minutes.