We sailed on the Infinity when it was new. Not much has changed with the exception of the food quality which was not as good as the first time. The ship logistics were excellent with fast boarding in Valparaiso and every port was reached on time with good shore excursion opportunities. In several ports (La Serena and Manta) we simply took local transportation to see the same sights as provided by the ship at significantly lower cost. In LaSerena we walked over to the bus stop and got there and back for less than$2 with the added cost of $1.50 for two museum entrances. The day cost us $3.50 each versus the $49.00 each charged by the ship. In other ports the ships excursions were excellent and took us to places we couldn't reach on our own like the Pachamach ruins and lunch in a hacienda with paso dobles horses in Lima and an excursion to the Embera Indian village in Panama. We also found the anthropologists lectures on board interesting and informative.
Some passengers were infected with the norovirus and the crew constantly was offering hand cleaner and sanitation and ship announcements were periodically made. I don't believe there were many passengers affected as we met only one passenger who was quarantined for a day. As a precaution we rarely ate at the buffet and took breakfast and lunch in the restaurant which was clean with good service.
The transit through the Panama canal was fascinating and well narrated. Our first cabin 2104 was noisy with w compressor or some other machinery sound cycling every 20 minutes or so. When we complained we were moved to another cabin 2022 which was actually larger and above all quieter.
If the Infinity had a future interesting cruise itinerary I would not hesitate to go as there is definitely value for money. We don't like large ships and Infinity is the right size.