Me and my wife spent 2 weeks here for our honeymoon and it was perfect for us!
The villa had everything we needed, loved that we had a large water dispenser for free, plus little things like plug adaptors, teas, coffees etc were a nice touch.
The staff were great and very friendly, we had a couple minor issues during our stay and they sorted everything out quickly and without any fuss at all.
The location is nice and quiet, away from the business of Ubud centre, but close enough that the shuttle only takes 15-20 minutes to get there.
The activites were great as well, slightly more expensive to go through the Villa but it was worth it as the driver will tell you all about the local culture, and take you to some quiet spots along the way, some of which are even better than main tourist attractions!
The only thing to note, there isn't a great deal within walking distance of the Villa. A couple small food stores, and some very small Warungs, but if you wished to eat at a larger Warung/resturant most nights, you'd need to take a taxi or have your own transport.
Overall we were really impressed with Bunut, and if your looking for a quiet base near Ubud then we'd highly reccommend staying here!