Product review (4 stars): So far very good with few reservations
Ordered on 3/31, arrived 4/6, standard shipping.
Since the reviews indicated that the product is very good, when not defective, I set out to test it immediately so I can return mine if it is defective.

Controls are easy - simply on/off - start - set temp level.
There are 5 temp levels, 1 thru 5. Default is 3.
Labels on temp levels are:
C1 - warm/melt
C2 - simmer
C3 - boil
C4 - fry
C5 - simmer

Using Digital Electricity Usage Monitor and  2 kitchen thermometers, I heated water without lid in a magnetic (induction ok) stainless steel pot, at almost sea level.

Control Level/Watts Usage/Water Temp
  C1  480  160  some bubbles at bottom
  C2  825  204  few streams of bubbles
  C3  990  209  ok boil, streams of big bubbles
  C4  1210  212  of course, good boil, more streams of big bubbles
  C5  1420  very good boil, much more, not raging amount tho

Overall, it looks like the product lives up to its promise.

I took 1 star off because during this test, about 1.5 hours of use, for no reason, while control was at C1 in the 1st 15 minutes of use, the unit started beeping with error code E1. It's the same error code I saw when I put a non-magnetic stainless steel cookware on it. I turned the unit off and back again, and it functioned properly. And also because max usage is 1420, not 1500. I'm hoping that this unit is not defective.