Franks place was a really great location, super convenient and nice for a basic stay. A few things to note, the curtains don't really cover the windows which are across one entire side of the apartment so we did tend to wake up pretty early with the sun every morning! The bedding was also a bit annoying, with two single duvets instead of one double which isn't ideal for a couple staying. Communication from Frank was really great though and he was quick to respond with any issues or queries. I would recommend this place for a budget stay in Berlin if you don't plan to be spending loads of time in the flat.