Don't hesitate, book this place! You will stay on the top part of a former boathouse, it is old, but very charming, with a huge sitting room /dining room /kitchen, and the cherry on top are the enormous french doors leading to the balcony with that incredible view to the small cove Niasca!
We thoroughly enjoyed our week here and ate all our meals on the balcony! It is very easy to walk to Portofino (15 min.), or S.Margherita Ligure (a little longer ). Even if the boathouse is underneath the road, you can hardly hear any noise.
The lower part of the house is where the watersport rental place is. While we were there, they had something like a children's summer camp going, so that it was quite noisy during the day, but before 9 am and after 6 pm it was quiet.