I could have stayed in the room all week and watched the changing colors as they played out across the water, mountains and buildings of Positano. Also from the room you will see that there seems to be no end of boats of all sizes coming and going from Positano. But, there is so much more to this hotel than the view. The hotel staff were excellent. The breakfast was excellent and the servers made sure that our needs were met. The room was spacious which is surprising considering how valuable any space must be in Positano. Our bed was adequate, not the greatest, but OK.
The swimming pool was OK, good for a cooling dip, but not for any serious swimming. If you walk down the steps to the beach you reach a gate where you can buzz the desk and they will open the gate for you. The beach is covered with rounded stones which are hard on the feet. Suggest you bring water shoes for swimming. There is only a small area above and below the waterline where you can stand without footwear (depending on how hearty your feet are).
While at the Marincanto, take the Positano bus to the other side of town and walk back. Also, take the bus to Nocelle and walk along the path of the gods. You don't have to hike the whole path to have a wonderful experience. Any part of this path will leave you with a memorable experience.