Up and running today. About half full when I went past, a few boxes of food on the tables but not much happening. It all seemed very relaxed, we'll soon see if it catches on.
The ordering site with a list of the menus here if anyone's thinking of going down. I'm sure Wok to Walk was on it earlier, eleven places involved doesn't seem like many. I guess others are having a look to see how it goes before they commit.
https://pay.yoello.com/g/cardiff-castle