I had never heard of this ruler before so I googled it. Found this blog that demoed the ruler use. It looks like it could be fun. I don't think it would work for a one block wonder, but for a regular kaleidoscope, it looks like it would make it easier.
http://pickledish.blogspot.com/2010/...uler-demo.html
In my opinion, you can find a speciality ruler for just about anything. With math skills (and paper pieceing sometimes) you can make anything with just one or two straight rulers. It just depends on how much money you want to spend on toys, and how much you want to think. If you enjoy drafting and working stuff out, skip the ruler and do it the old fashioned way.
Trust me, my sewing room is full of rulers. I waffle between making things easy and facing a challange.
For Storm at Sea, I bought the Fast2cut templates. The quilt I made from that came out great!