We stayed at the La Fonda and loved it. Walking distance to a lot of great places.
We had reservations at Sazon for one night, but had to miss it unfortunately.
Our other dinners were at Estevan, Coyote Cafe and La Plazuela (inside the La Fonda). None of them rate as high as Geronimo but they are within walking distance of the plaza and are good choices for local cuisine.
But as others have said, don't miss The Shed. Great food. We had lunch there twice.
Loretto Chapel is a must-see. Canyon Road -- tons of art galleries and jewelry shops. Lots of shopping around the plaza. We were a little disappointed in the Georgia O'Keefe Museum but there was construction going on so a good portion of it was closed down.
We loved the Herve Wine Bar off the plaza. Very nice place and local wine from the Lescombes family.
https://lescombeswinery.com/locations/santa-fe-herve/We did a glassmaking class at Prairie Dog Glass that was a lot of fun.
https://www.prairiedogglass.com/Mostly we just walked, shopped and had food and drinks. My kinda trip.