Chris, I shared that link at another forum and a user that has toilet trained their cat had this to say:

Those do not work. They are flimsy plastic and the cat will fall through them ruining any chance you have of him trusting the toilet seat.

They also can't be adjusted finely enough. You'll have to shave off only 1/8 inch some times to keep the cat from seeing too big a change and rebeling. These only have 3-4 stages. There are yahoogroups dedicated to this sort of thing. Lots of info to get you started and lots of FAQ, troubleshooting, success stories etc.
I realize it's all a matter of opinion but I just wanted to share.