Here's what one person thinks.

Here's another, and here's Part 2 of it.

Here's another. That's someone who would like to believe it works, and yet:

By their own admission, Lutec engineers are still deep in research and development, refining their prototype. Some reports extant on the Internet read as if the Lutec 1000 prototype has been running continuously for months, if not years, which is a fair interpretation of the statements made on the Lutec website. However, when explicit details are requested, this turns out to not be the case. According to Lou Brits (the 'Lu tech' of the company name), as of April 3, 2005 the longest they've had the device running continuously has been four weeks.

The claimed 1000-Watt output which is fifteen-fold over input is not a stable output, but is an extrapolated maximum predicted to occur when everything is running right -- which has not yet been achieved. The 4-week continuous run, according to Brits, was at around 200 Watts output. The stable point is between 200 and 250 Watts, he said. That is with a rotation speed of around 200 rpm. When it gets up to between 600 and 700 rpm, where it begins to approach an output of 1000 Watts, it becomes unstable, frying circuits and switches. Brits said he has gone through maybe one hundred thousand circuits and switches in the ten years of experimentation, and is still frying them routinely.

And here's some more -- the conclusion of the same report quoted above:

Just because a technology taps "free energy" does not magically make it a holy-grail solution for mankind. Wind and Solar and Geothermal and other mainstream technologies have been doing that for a long time. They are making a difference -- more each day. But for a device to be competitive and to make even more of a difference, it needs to be able tap that free energy inexpensively and reliably as well as cleanly.

My assessment is that Lutec is years away from beginning to make a dent in the world's energy needs, if they are to make a difference at all. The integrity quotient of a company that makes significantly exaggerated claims on its website, and does not correct them after years of such misrepresentation, is seriously low. That, in and of itself, renders the company much less fit to make a difference for humanity.