Loved it, loved it, loved it.
The location is amazing - walk out the door and you are in the midst of great shopping, restaurants, and nightlife. It also is an easy walk to many historical attractions. It worked amazingly well for vacation and would seem to be equally good for a business stay.
The apartment is as stylish as advertised (My wife took multiple photos of design elements to copy back home). Importantly, it was as comfortable as it was stylish, with cozy seating areas and excellent bedding.
The host also is great. He is very responsive, had the place in immaculate shape, and had all sorts of nice flourishes akin to what you would find at a high-end hotel.
Our happiness with the apartment enhanced our stay in Lisbon, which is what you hope for but don’t always receive. Our family agreed it was the best place we have rented from Airbnb, VRBO, and Homeaway. We would stay there again in a heartbeat.