An American friend of mine who's lived in SD for about 15 years kept raving about the Swiss restaurant on 30 de Mayo, so one night my husband and I took his brother & wife there for dinner. It was great, we all enjoyed the meal.
Turns out we were at the wrong one, didn't go far enough west to the one she was recommending
So we just had to go out to the other one another time, haha.
Turns out both are very good!
AE