We had a great stay in this apartment! We are traveling as a couple, and it was very spacious for us. It is not in a new or modern building, but it was clean and had everything we needed for a few days stay, including lots of nice touches from the host (like local treats and fruit). It's steps from the closest subway station and we found several convenience stores and cute coffee shops and restaurants immediately nearby (in particular, we loved Maple Maple - just one block away).
May was such a kind host - she met us at the apartment to welcome us and was very friendly. She walked us through how to turn on the washing machine (and had detailed instructions in English for us to follow) and sent directions and photos of the blocks for us to walk to the downtown area. The apartment is a little bit farther from the most central part of Xinyi than we originally expected when we booked, but I really shouldn't complain as it was a pretty easy 10-15 minute walk. Plus, the view of Taipei 101 is great!
Overall, we'd definitely recommend staying here!