I love welsummers, love there eggs and bred them for many years, also crossed them with Cuckoo Marans for a sex linked cross, the eggs from this cross were fantastic.
Anyway never used them in my meat bird project because they are a light breed and I think you have to stick with the heavy breeds to save disappointment.
Having said that Hugh from river cottage had one in his IG cross taste test and said it was delicious.
Although very slight.