RDD in Redmond also did my de-ice installation and I am here to tell you it
works.
My wife even stopped reading her book to watch.  We had an "out", so I let
the plane stay
in not ideal flying conditions for about 45 minutes and let the Thermawing
heaters do its
thing.  During this time, since it was working so well, I could not tell if
it was working. So I turned it off.
It didn't take long to confirm it had definitely been working.  I turned it
back on.

Although the installation took a little longer than planned, I believe RDD
did a great job, and
the people are fantastic.  The install on an existing plane is not a simple
process but
those guys knew what they were doing and since I watched every part of the
install, I
was very, very impressed with their work.  I hope I did not get in their
way.

Dan Reagan
Cincinnati (Heart of ice country)
N10UU Lancair IVP 500+ hours