Helen's apartment is quite lovely and though it has a very central position, it lies in a quiet side road. You have everything you need and due to its location, you can reach many places like the cinema, the National Portrait Gallery or the supermarket by foot. If you want to see more distant attractions, you can take the tram or the bus from the tram/bus station which takes you 5 minutes to reach.
We're really glad that we chose to stay at her apartment and can only recommend it!