Its a nifty machine, and he has some really interesting videos on his site (woodgears.ca); one of the fun ones is his experimentation making a better mouse trap.

For the joints that he's making with the machine I'm a bit skeptical that this is really the best way to do it. At about $1000 for a pre-built metal one shipped to the US, you can avoid some of the fiddling you would have to do to construct the machine itself (but still need a router motor). However, this is more expensive than the special purpose jigs, and I'm not convinced you're going to have better results.

He demonstrated the integral dowels, but frankly, with glue being stronger than wood, I'm not sure that it really is better than just a doweling jig for that purpose.

For example, with the $150 Porter Cable dovetail jig, you are going to get a few patterns and be able to do dovetails much quicker than with this machine.

He clearly enjoys working with his machinery (e.g., he built a dust collector and band saw from scratch), so I'm sure he had a lot of fun designing and building it. And there are many reader-built panto-routers too, so some people certainly like it.