I stayed at Richard's place with two friends for a girls' weekend. It was the perfect spot! Comfortable beds, great kitchen and lots of space to hang out. Really loved the peaceful location -- but do keep in mind that the GPS does not get you there accurately (Richard had warned us and sent us specific instructions). We spent a lot of time at the house and then driving back and forth between it and Nevada City (~30 min drive).
The upstairs AC was broken when we were there (downstairs was fine), but we let Richard know and given his responsiveness, I'm sure it will be fixed soon!