Floor plan is great for what I've seen in Santiago. Very open compared to what I feel is common in typical studio style apartments that I've seen in Chile. Balcony is extensive and a lot of open air can flow through the place as well. Kitchen has ideal versions of the amenities you look for. Nice A/C. I'd say it's one of the better spots I've been to in Santiago in terms of floor plan, spacing, amenities and aesthetics, especially if you're the no frills type of person.
The location is great if you just want to be in the center of the city. If you are looking for Bellavista nightlife, then it's not an optimal location but still not bad. It's just a short taxi ride to bellavista, and its also in walking distance to Barrio Brasil. Technically its walking distance to bellavista too (or you can use public transportation, some buses run 24 hours, trains stop at 11:30Pm), but I think many people would not feel comfortable walking at night from bellavista to santo domingo.