Researching on the web, they are a sort of poor man's asparagus as they are said to have a similar flavour and consistency and don't require a trench or a 3 year wait for the first harvest. Just cook in butter with a little salt. I'm not sure they taste like asparagus, but an interesting pod nevertheless.
I've had a reasonable yield from them if compared to the pea harvests, but I think they are more suited to a larger plot than grown in a container.
However, in their favour, they have continued to crop when other harvests have dwindled in our not particularly disappointing British summer.
A very interesting novelty crop to experiment with as the pods look so interesting and the flowers so pretty. It's always fun having something new to experiment with in the kitchen.
Maybe a good one to try with children as they can be sown outdoors, are quick to germinate and have their curious looking pods.