This apartment is in the most dynamic, traveler-friendly neighborhood of Taipei. Xinyi District has everything you could want or need: shopping (from local mini-marts to luxury stores), dining (street vendors, coffee shops, small restaurants, to 5-star banquet style), and easy access to transportation (buses, MRT stop literally across the street from the building, and taxis).
The unit is small, however, and the bedrooms are located directly on top of each other. There is limited auditory privacy so guests would be wise to take this into consideration depending on who is in their traveling party.
Communication with Will and Sandy was prompt and in English (we have limited Chinese reading/writing abilities). English instructions for the apartment's systems (A/C, microwave, washing machine, TV) would have been helpful and saved all of us from a few emails back and forth.
As others have noted, we noticed the sewage smell in the bathrooms but the smell went away within 30-60 minutes after taking a shower and air fresheners did help so this wasn't a huge issue during our 10-day stay.
Lastly, all travelers to Taipei should be aware that Airbnb is not allowed in many buildings throughout the city. If you're not comfortable with having to keep a low profile or being prepared to answer questions and answer that you're a host's "friend/family", you may want to stay at a rental where Airbnb is allowed or hotel. This listing's daily rate is more expensive for some valid reasons (location, modern decor, cleanliness & amenities) but this may not be worth it if you don't appreciate having to stay "under the radar" of the doorman and other building residents.