Hi,
I'm one of the authors who worked for PC Mag and I wrote some of these
utilities.
First, I'd like to mention that these utilties are no longer free. You have
to pay a smal fee to download them unless you download them from a site that
is not sponsored by PC Mag, in which case the download is illegal. This
change in their distribution policy caused much trouble and most of the
authors leaved the development team (and so did I). It's a very strange
situation now where people have to pay for a software that once was free and
delivered with full source code. I never understood this move.
As authors we were paid to write these programs - under control of PC Mag -,
write the documentation, participate in a thorough beta testing and provide
support and maintenance for a reasonable period of time after the initial
release. Sheryl Canter, who was responsible for the Utilities column was
very demanding regarding quality and I can assure you that the focus was
really on it. Moreover, since the source code was delivered, it was easy to
see how carefully these programs were written. Finally, each author had to
write an online article explaining how the program works and explaining to
other developers how it was designed.
So I think that you can use these programs with confidence. Note that I'm
not getting any money from their sales and that I no longer have any
relationship with PC Mag. I just got a one shot compensation for each
program. So I'm not *that* biased when talking about these programs

.
Regards.