I found classes very usefull. It allow to write object code in perl5 without having to do a lot of stupid controls that are not related to the code itself.
It allow to have very compact code, and really natural, from my point of view.
I am really astonished that "classes" seems to be not very popular. Perhaps it is because of Perl6, but there is a lot of Perl programmers that don't intend too use Perl6 in a short term. And "classes" seems to be a really good way to produce object programming in Perl5.