Ben's place is beautiful and clean. It even has a massage chair which was amazing after a long day of walking around Taipei. The rooms in the apartment are situated with slight steps up and might be a little slippery so older folks have to take note but other than that, rooms are beautiful and clean. There is a washing machine for you to wash and you can dry your clothes on the balcony as well.
With regards to location, it is about 8 minutes walk from the Ximending metro but super near (1 minute walk to a 24 hour carrefour).
My only point of improvement would be that the extra beds provided were too thin and did not allow us to sleep well as we could feel the floor and work up aching. (We had 6 of us so two extra twin mattresses were provided)
Would definitely recommend ben's place as it is really new and clean :)