In a great location just a stone's throw from Potsdamer Platz, Check-Point Charlie and several U-Bahns, Taieb's place is super convenient. The apartment is spartan, but clean, and the hosts are extremely polite, caring and supportive. I'd suggest ear-plugs and eye-shades if you are sensitive to noise or light, as the building is not sound-proof, and there is some traffic throughout the night, and with glass doors/windows on two sides, light inevitably shines in.
The room has access to a great big TV, goo WiFi, personal cabinet/closet space and a private balcony - a benefit in summer, for sure! And the room can be locked if you choose.