We stayed at this apartment long-term. Not only is Ken a fantastic host and friend, the apartment is equally awesome.
One would not notice, since the accommodation is located in a secluded, quiet yard, but the apartment is located right in the centre of the French concession, a renowned and very nice neighborhood. All necessities are available in about a 2 minute walk. More importantly, there is a metro station within 5 minutes reach and cool locations like Jing'an temple and People's square are within walking distance or otherwise directly available by metro without interchanges.
The apartment itself lies in a quiet courtyard that is guarded around the clock. It has a firm bed and comfortable sofa-bed. There is a nice kitchen available, but with all the nice restaurants in the area there's practically no use for it. The bathroom is European style, clean and very nice. Laundry and drying works very well at the balcony.
So yes, the apartment was great. We, however, found the host the greatest advantage of all. Ken became a good friend during our stay, we have traveled together to Suzho, had dinner together several times and went out for drinks. It was a lot fun, and Ken always gets stuff done. He's by far the most helpful host we ever had and we're definitely staying in touch in the future.