Not nice. Skin is extremely tough and meat taste similar to stingray but much tougher and 10X more smelly.
Their meat is so smelly and pungent that it is commonly used in crab net to attract crabs. I used to buy it all the time during my younger days playing with catching crabs.
During cutting, the meat stinks like hell, unlike any fish smell, in fact its prolly the smelliest meat you've ever encountered like some farking dead creature LOL.
Don't believe you go wet market and buy one, the moment you wash it under running water your whole kitchen smells like hell.