I stayed at Petra's flat for my first month living in Berlin while I sorted out somewhere more permanent. Petra was an excellent host and made me very welcome. Where she really went the extra mile was in helping my German skills to improve by patiently speaking slow and simple German in the flat, despite my often being tired and unable to concentrate properly owing to my long working days, and then switching to her very good English when I failed to understand (which was quite often actually). I would happily recommend this place to anyone looking for somewhere to stay in a reasonably quiet but well-connected neighborhood in Berlin.