They are actually a variety of melon I learned last year. They taste, just like cucumbers. They do not get bitter even incredibly overgrown and apparently do not get woody or tough, make great pickles, are great raw, do not need to be peeled to eat and Mom didn't burp or get indigestion as a result of eating them.
The down side is they need a LOT of room. I mean those vines go forever. I think the 2 plants we grew last year (going the same direction) took up a good 20'X 5' area of the field. It wasn't a problem cause their only competition were gourds. I'm confident they would do well on a trellis and that would help you get straight fruits.