Target Landing Aid-VASI Type

In article ,
(Seth) wrote:

I read about a VASI-type landing aid that sits on top of the cockpit
panel or attached to the glare shield. It produces a "red dot" and
allows the pilot to define his/her glide slope, etc. The product
could be viewed at www.argenav.com.

Has anyone had any experience/demonstration of this or a similar
product?

Seth

I would think that an enhanced laser pointer would work in much the same
way -- if the dot movesaway from you, down the runway,you need to reduce
power, add drag or slip; if it moves toward you, add a little power.