Interesting idea. Seems a little pricey, but the info on the web site is minimal. Watch the videos - it helps understand what the jig does.
At first I thought it was made out of MDF. After watching the videos, I'm pretty sure it's plastic.
There is a funky clamp with cogs that look like they provide 32mm spacing. Not explained or shown if you don't watch the videos. I couldn't see whether the clamp is included with the jig or not, but I couldn't see that it was sold separately, so I assume that it comes with the jig. No indication of how long the clamp is, unless you want to guess from the videos. If the clamp is included, that would help justify the price.
It only supports certain sizes of Dominos. Since I only have a Domino 500, I might be tempted to get this if I need the larger sizes, but the web site doesn't tell you what sizes are supported, only that there are three.
Overall, I'd say these folks need some help from a good web site designer.