Valpa (as it's called) in general is not a good town for wandering tourists looking for quiet relaxation. There is no beach (there are beaches nearby), no waterfront park, no single tourist district. The streets are very narrow and climb up and down the hills that give the town its charm, with story-book houses in every color on every possible square foot of land. We only spent a day there but did a lot of walking with a sampling of the artsy, free spirit that seems to define the town.
Our daughter, studying in Santiago, found and booked Puerto Natura for us on the fly after discovering that our first booking was on an industrial street and unacceptable. We were literally walking through town at 6pm with no hotel. The owners were extremely accomodating, spoke reasonably good English and gave us great service with an appropriate amount of space.
This is as much a spa resort as a B&B, with full facilities for sauna, mud bath, aromatherapy, massage, etc., though we never felt the least pressure to add any of these services. Breakfast was simple but adequate and delicious - not a place for gourmet cooking, but the orange juice was fresh-squeezed and, like much of the food, from their gardens on site.
The gardens are a key attraction - be sure to ask for a tour if there is time. Incredible to find this in the middle of the city. Location is also very good, with several options for restaurants within easy walking distance (just be very careful on the steep sidewalks with unmarked steps and curbs!). Key attraction for Valpa is Pablo Veruda's house, almost next door to Puerto Natura and built by the same architect.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC