Eric and Gini's apartment is a brilliant place to explore Berlin from. It is exactly as cool as it looks in the pictures, only 6-7 minutes walk to the station where trains run every few minutes in to the city centre stations. There are plenty places nearby to eat and drink.
Eric and Gini were helpful and friendly and often around to answer questions or give advice.
If you're looking for a stylish and convenient place to stay when visiting Berlin, you couldn't do better than this.