My parents had a great stay at Liz's apartment. It was bright, quiet, clean, and comfortable. It's also a good location: this corner of Moabit is charming and low-key, Hauptbanhof is quite close, and there's a U-Bahn station right across the street. We didn't meet Liz in person, but she was very responsive by email. (The housekeeper, who handled the keys and such, was super friendly too.) The only problem was that we couldn't get the Wi-Fi to work, even with suggestions from Liz. But all in all, a very good visit. Thanks again!