We had a pleasant stay here recently. Tammy’s place is in a great location - tram right outside, 5-10 minute walk to Mitte station, and 20-30 minute walk to most tourist sites. It was overall a great value.
There were a few small things that let down our stay - namely that the check-in instructions were unclear and we weren’t given much guidance about the house or the area compared to other hosts we’ve stayed with. We also had an uncomfortable sleep most nights - partly due to the uncomfortable bed and extremely flat pillows, but partly due to lots of noise every morning at 6 am from the business right outside (which was, of course, no fault to the host).