I have read a few articles mentioning converters from one language to another.

I'm a bit more than skeptical about the use of such kind of tools. Does anyone know or have experiences let's say about Visual Basic to Java or vs converters? Just one example to pick

http://www.tvobjects.com/products/products.html, claims to be the "world leader" or so in that aspect, However if read this:

http://dev.mysql.com/tech-resources/articles/active-grid.html

There the author states:

"The consensus of MySQL users is that automated conversion tools for MS Access do not work. For example, tools that translate existing Access applications to Java often result in 80% complete solutions where finishing the last 20% of the work takes longer than starting from scratch."

Well we know we need 80% of the time to implement the first 80% functionality and another 80% of the time for the other 20 %....

So has anyone tried such tools and found them to be worthwhile?