We decided on the spur of the moment to have dinner downtown and Pisa was only a 2 min walk from where we parked. We were there early around 18:30, and were seated immediately. The menu is simple but everyone should find something they like (pasta, salad, pizza, main courses meat and fish). We tried the pasta and it was very good. Shortly after we came the a number of families came and it was not their first time there. So to sum up, the food is good, it is a good location downtown, the location is great, so definitely a place to try if in Reykjavik.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.