My flat is a very nice, cozy and quiet one. You can get the city center in within 23 min bus or 10 min with the SBahn. I have recently renovated the place.
Close to the city but very close to the forest and 5 min walk to Neckar river. The town is a very old one full of lovely houses, bars, and restaurants. After you have been in Heidelberg city and come tired you will feel at home, getting rest and recovering from your next trip. I am sure you will enjoy your stay here.