Khoa's place is very clean and comfortable. There is a nice fenced-in private patio accessible from the living room. It is located close to the downtown areas of both Mountain View and Palo Alto -- this was a great location for me since a major reason for our visit was to show my wife the places I had been while growing up (in Mountain View and Palo Alto!).
There were couple of small issues, but Khoa handled these right away. One of the issues had to do with the toaster -- he got us a replacement toaster within hours!