The only drawback, if one can call it that, is that virtually...

The only drawback, if one can call it that, is that virtually all properties are manipulated directly in public variable arrays. The user friendliness and safe use would increase significantly if the properties were changed by means of methods. Using methods would also more less self document the use of the class. As a super last step, I would personally like to see this magnificent class be ported to version five of php. The interface section for php five also gived a nice overview.

Worked nicely in PHP 5 as of 11/2009.