Functionality like this can be gold, and it can be total utter crap. Especially if like JavaJones says it can't be turned off completely.
Some laptop touchpads just have very crappy placement compared to the keyboard, whereas other laptops have perfect positioning where it is never an issue. Some touchpads are sensitive to these sorts of large area contacts and/or light touches, whereas others really take a bit more effort to register your fingers. Some support only one finger at a time (getting rarer nowadays), others can recognize multiple fingers.
Combine that with the sort of work you engage in (lots of keyboard shortcuts, simple typing of documents, lots of mouse mucking, etc) to find out that this sort of tool depends on both user and laptop. Trade one of the two for another model
and the tool may not be needed any longer.
Thanks for linking this; it is really useful and a typical thing I wish I would have had 3 years ago.
At least now I know of this sort of tool so if I need it, I can find it!