I am planning into converting the remaining beds. Well, except for one bed where I have a sumac that volunteered and I think it would be a shame to remove it from there, plus my garden could use some shade.
In my opinion hugelculture is far superior that flat beds for a number of reasons: increased growing area, less or no irrigation or fertilization, extended season, micro-climates etc. etc. The only downside is that they don't lend themselves to harvesting with large machines ( kinda a plus in my book).
The Greenhouse of the Future ebook by Francis Gendron