Why WebbyFiles?

How does WebbyFiles compare with other commercial products?
Why the source code is important?
How does WebbyFiles compare with Open Source projects?
The product XYZ looks much better than yours

WebbyFiles Versions

Which are the differencies between the Java and the PHP versions?
Which version should I choose? Java or PHP?

Limitations

Which is the maximum upload size?
How fast are the uploads / downloads?