We, a family of two adults and two small children, stayed two weeks in this house in August 2017 and had a great time . First of all, we found the house and location to be almost exactly as described and the photos are very indicative of the place. The owner/hostess was very helpfull and available for all kind of questions prior to and during our stay (safety nets were installed especially for our children, additional information was provided).
The house itself gives you a lot of privacy which we enjoyed a lot (apart from the last couple of days when some other tourists in a house nearby decided to play extremely loud music late at night). It has basic furniture which worked wel for us. We only found the bed/mattress to be somewhat uncomfortable (note that the house has three beds, we brought our own babybed). Although the house might not be ideal for small kids, we did not encounter any major downsides. It was very hot during the first days of our stay, so it was pretty warm in the bedroom upstairs. The hostess kindly provided us with a fan so we did not have any trouble sleeping.
There are three places to sit outside and enjoy the view. The surroundings are really beautiful. A, short, steep path brings you to the beautiful sea directly (5 min), a 15-min walk (and some stairs) brings you to the beach. Bonassola is a small village with enough facilities (Levanto is the closest more city-like place). You can rent a bike, walk or take the train to other places near the coast. In Bonassola there a some nice places to enjoy some focaccia or have dinner (or just buy some home-made pasta or pesto in the local shop).
In conclusion: we would love to return to this house in Bonassola in the near future and enjoy a very relaxed and peaceful vacation!