Really stylish, high-end apartment about an 8 minute walk west of Ximen station. I stayed here for 2 weeks and would mostly recommend it. The location is quiet yet still close to all the popular Ximending areas, though first-time visitors may prefer a location a bit closer to the MRT.
Check in was quite smooth; I was greeted by Barry at the arranged time and he gave me a quick tour and explained all the procedures to me. I'd say the apartment itself is very luxurious (the bathroom is amazing!) though a bit sparsely furnished so one might find a long-term stay here a bit harder. All the necessities are provided (iron, hairdryer, laundry, towels, etc) but I didn't have an ideal place to sit down and work, or to unpack all my clothes. Really minor issues, and I wouldn't hesitate to come back for a shorter stay.