Sonia and Pablo's place is a perfect home base in Zürich. The location is ideal; you can walk there in about seven minutes from the Hauptbahnhof. The Opernhaus is fifteen minutes away on foot. And you're in the middle of the gorgeous old town with countless shops and restaurants.
Communication with them was easy. They reply very, very quickly. When I fumbled a bit with the lock the first time, they opened the door remotely immediately. It's wonderful to see hosts so invested in your comfort. They are truly receptive to suggestions and were kind to check in to make sure I was happy.
The apartment is very clean. The bed is comfortable (and with two very warm top blankets). While I didn't use it, the kitchen is well stocked. There's a good table for dining or working (or a Zoom meeting back in America). Occasionally, there is a little noise, but staying in such a popular area, I expected it (and it wasn't really problematic). It's such a warm, inviting place.
I would return to this apartment in a heartbeat. And the next time I am in Zürich, I will check it first.