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One more comment: to compare CAD systems, the gold standard is the 
knowledge of a designer who is *familiar* (not merely acquainted) with both 
systems.

There is also the ease of use criterion, and it has two aspects:
(1) How easy is it to learn to use the system?
(2) How easy is it to use once you are an expert?

It is very difficult to evaluate the second based on a 30-day demo or even 
longer, but it is expert use that is *most* important in the long run. On 
the other hand, a difficult-to-learn system, even if it is efficient for an 
expert, can make it difficult (read *expensive*) to find designers for the 
system.

Cadence is famous for a steep learning curve, and Cadence designers command 
a premium. It is *not* necessarily because the work they do is better than 
that done by users of other systems....

PADS also has a reputation for being clumsy to use. I can't say, I returned 
my copy when I discovered that the license permitted them to repossess the 
software if you did not pay maintenance.... To their credit, they did give 
me a full refund, even though I was pushing the return period....


[EMAIL PROTECTED]
Abdulrahman Lomax
Easthampton, Massachusetts USA

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