Big pluses and a few small minuses.
Pluses: Super-comfortable bed. Shower worked well. Heating/AC unit worked well. Nice neighborhood for walking. Easy parking. The guest house door opens onto a nice garden area while still allowing privacy. Nicely designed room.
Comfortable desk chair, large desk, plus a little bistro table. Separate from the main house, very private. Good value for the area. I travel to this area often; the location is super-convenient for me and I will try to stay here again!
Minuses: Bath towels were dingy and stained. Desktop lamp didn't turn on (though there were other lamps). An information sheet inside the unit listed nearby restaurants, and I walked to one for breakfast but it had gone out of business...so I had to go elsewhere and ended up late to a morning meeting. There was a coffee machine but no coffee. When you open the gate to the yard to get to the guesthouse, a light turns on at night, which is great; but then as you walk through the yard to the guest house there are lights that did not turn on--which made me very glad that I arrived for the first time by daylight. I wasn't planning to use the bicycles, though I noticed there were two bikes and both had flat tires.
Overall, a great stay and I will try to stay here again when I come back to this area.