We had a fantastic stay at Rosa and Syd's place. They are truly superstar hosts: accommodating, communicative, and friendly.
The location is great, in a quiet but lively neighborhood with plenty of great food options. I took the bus to a conference in the financial district every day -- easy (thanks to Rosa's advice). The bus stop is a very short walk (a block and a half) and it only took ~20 minutes to get downtown.
The cottage itself is just lovely, seriously super-clean, and is appointed like where you'd want your family to stay: great linens and mattress, beautiful paint job, nice hand soap, bottled water in the mini fridge....lots of little touches that make you feel welcome.