It's very simple, and a quick knit. Since I was at an event most of the weekend I couldn't knit as much as I would have done at home (there was, after all, court to plan, and to hold :) ). And still I finished it Yesterday.
I used a worsted weight yarn bought cheaply at a supermarket some years ago and 4,5 mm needles (US #7). The barrett was fulled in the washing machine on 60 degrees Celsius.
I am extremely happy with it.