This cruise was booked through Infinity Cruises in London as a package, including flights, some transfers and hotel accommodation at beginning and end of the cruise. The booking process was excellent and I have no hesitation in recommending this company.
We flew to Santiago which was very pleasant, with jacaranda trees in full flower throughout the city, It felt very safe to walk around, even in the early hours of the morning. The hotel, Torremayor Providencia was very good with a small rooftop swimming pool and one of the best breakfast buffets I have hade, including fresh strawberries and cherries. It was very close to a metro station which made travel into the centre quick and easy. Transfer to Valparaiso was included and the embarkation procedure went very smoothly, although, because of the early sailing time, we had no time to see the city.
I had read that the cabins on Norwegian Sun were small, but the one we booked (an inside) was spacious and quiet, with plenty of storage space. The ship itself never felt crowded, and we never had to queue for meals. (We avoided going when the shows ended as queues did form then.) We had booked the cruise with an all-inclusive drinks package. I do not know whether it would have been worthwhile to pay for this at the shipboard price, as we did not drink to excess, but as an included item in the package, it was great.
The cabin was reasonably large and had two wardrobes, two sets of shelves and two chest of drawers, so there was room to put everything away each in our own space, and not get in each others way when dressing. It was very quiet; something not always the case onboard ships.
We liked Montevideo as a city. It was walkable and had a number of interesting buidings for visiting.
Went into the centre via a shared shuttle from the port and walked around the town. It was interesting and worth seiing the former houses of the very rich merchants of the city.