I won't do one again. The first one I did from within a guild was to have four rounds. The only person to get four rounds was the person who did not do her round for the other three of us. And she was the one who insisted we do a round robin.
Again, within another guild, I made the first row, the second row was wider, the third even wider, etc. Just a miserable mess. Obviously, this was a row robin.
Very disappointed in both cases.