I've used both Embperl and Mason (and eperl, and several others), but I really prefer Mason. They've got good documentation and personally, I thought that it was easier to install and configure than Embperl. I've used Mason off and on for several years now, and I have no complaints. Not to say that Embperl is a bad choice, mind you. Others may disagree with me, but if I had to choose between Embperl and Mason, I'd pick Mason every time. Hope this helps.