Yes, I have grown it.
First attempt: bought seeds in the sale in Autumn and none germinated. Complained to the seed company and got a new harvest seed packet replacement to sow in spring. Lesson: the seeds have to be absolutely fresh, they only last a few months. Less long than parsnips. Although I did not explore whether seed can be frozen.
Second attempt: they germinated well and grew well. Unfortunately I did not like the flavour. Perhaps I do not have the cheffie touch, but adding them to salad just added something that nobody wanted to eat. Cooking did not help much either. But don't let me put you off.
As always I try to save seeds from everything I grow and I could not save any either from Agretti. Not that this was important as I am unlikely to give agretti another go.