Nice and clean way to work with R2r, I made a circuit on my breadboard, but the BNC jacks were hard to keep on the breadboard. This was great for being able to just put on the Arduino and the BNCs were stable, and easy to work with. It did not come with documentation, but really I am not sure it needs it, if you know you want an R2r circuit, then its there. I bought as the kit, took 10 mins to solder it together. I used his code, and then changed it to write my name on my scope, worked great.