After a few miscommunication issues getting checked in, I enjoyed Hermann's place, though I would not recommend to more than a couple. It is simple and very affordable, and that is what you get. Small kitchen, so don't plan on doing a lot of cooking. Otherwise, public transportation options are abundant, with the U- and S-bahn only a few minutes walk. There are a few places to eat or drink (Cancun Berlin is good Mexican and Zur Elf is a great locals bar), but I would recommend hopping onto the U if you want a wider range of options (check out Sushi Berlin on Bismarckstraße near Deutsche Oper station). There is also a 24-hour convenience store and a larger supermarket within 5 minutes walk. Overall, given the affordability, I would recommend Hermann's place for a short trip to Berlin.