To be honest, Vienna seemed overrated and incredibly expensive to me, but it's still a truly European city. If you go there with realistic expectations, you'll have a good experience
I was most captivated by two things: the magnificent palaces and Klimt's paintings, these alone are enough to make the trip worthwhile.
As for food, despite the prices, there are a few dishes worth trying: sausages from the stand near the Opera, classic Sachertorte, strudel and coffee in a genuine Viennese café. These are the local classics that people come here for