I haven't been involved in that cross, but I think it would be a great cross. They are known for great disposition and meat quality. The meat qualities, marbling, marbling fineness and tenderness is a dominant trait in Wagyu. A wagyu cross should result in 50% of the offspring blending the wagyu meat qualities with the Swiss genetics for meat quality and 25% of the offspring having all of the wagyu meat qualities. 25% would be like Brown Swiss. Naturally, with the milk from Brown Swiss, I would expect the calves to excel. Looks like a "win" "win" situation! I'd like to hear about the results if you choose to do it.