This is a great location away from all the crowds. We were gone all day until well after dinner but if you like to head back around dinner time and make supper and relax, this would be a great choice. There is a large deck and grill, chairs, etc. The view is also amazing. - you can see so many stars without all the city lights! It is also has two gated drives so you feel quite safe.
Do not worry about not staying right in Napa. There are wineries everywhere and hardly any crowds up in this area. We also drove to the coast one day which was very doable for a day trip. There is also some great local places to take hikes.
There were lots of places to eat nearby and a great local market. The back road into town had some of the best views we saw on the trip. It was also a great road to walk or jog as there was no traffic. Very hilly and curvy in places so expect a good challenge. A tip from us would be take this road down every day and enjoy the views. Then at night take the less steep main road back up.
Make sure you don't mind that one bedroom is large, and the other quite a bit smaller if you are traveling with two couples. This was not a problem for us but just something to note.
Everything you would need is provided. (Lines, soap, etc.)