I love schnitzel! And I had the pleasure of tasting schnitzel in many different restaurantes in Heidelberg. I can tell you, these were not bad but also not the best. I guess the Broccoli schnitzel was tastier than the Schnitzel Caprese.
However, as always here, the staff is really friendly and if you go during the week is not that full. On weekends it might be too crowded.