You’d have to grow loads, and I means loads, to get a decent harvest. Although I was intrigued by the plant, I didn’t think it was worth it. Was a waste of space and could have used the land, time and effort growing a more productive crop.
I use the same one as plantmark does and haven’t had any issues so far. Have had it over a year now. Even left it out a couple of times without ill effect. Am very happy with it.