It's important for you that you can express yourself about this class, finding utility, consistency, documentation and examples bad ; not for me. Several hundred of people are using it without problem.
If you need some help, it will be interesting to say wich kind of error you have noticed.
It may be a good idea also to read the complete documentation. Nobody being perfect, I don't speak all languages. So, the complete documentation is written in french in a PDF format downloadable from my web site indicated in the README.txt file. Here is only a minimal documentation in english (in the class itself) and demo files. I suppose it is sufficient because most of people can use it without the french documentation. The most important being to be able to read.
nb: PDF documentation is not in this package because phpclasses.org can't accept PDF files when we're uploading classes.
You can see this class in functionnal use on my website and at :
spszl.cz/~vascak/moje_php/fyzika_te ...
and
spszl.cz/~vascak/moje_php/fyzika_te ...
in Czech language.
If you need some help you're will be well advised to say what or else it will be difficult for me to help you... :o)
Pierre.