Reg Edwards wrote:
. . .
The only way of accumulating confidence in a computer program is to use it
and compare results with what you are already aware of as being true. . .
. . .

SPICE has been used for decades in the design of countless products that
you undoubtedly use daily. It's an extremely useful and valuable tool,
without which many modern designs simply wouldn't be possible.

Roy Lewallen, W7EL