Very charming house with nice back yard. Super clean and modern. If you open the windows, there will be noise from the road outside. It was hot during our stay, so we endured the noise. Location is out of town a bit, but cabs are easy to get and the tram is about a 15 minute walk. Groceries also 15 minutes away by foot.
Oppiner St is a bit away from the main Train station and Marktplatz (town center) but it's right next to the Trotha tram station and there are a number of trams to whisk you either place in minutes. Beds are comfy and large (maybe even a King by American stds) by EU standards. Lots of space on multiple levels (there are a lot of stairs!) .... Rolf and Susanne are avail if you need them. Highly recommend!