In summary:
Location - The apartment is really convenient as there is a coin operated laundry shop nearby, a couple of 24 hour convenient stores, bus stops that connect you to the MRT system and there is also a Ubike station close by. Taking the bus (Bus 22) from Taipei Main Station will take you directly there in about 40 minutes so it's pretty convenient if you took the MRT from Taoyuan International airport or the HSR from anywhere else (in Taiwan) to Taipei. The highlight for me was that the apartment was really close to the Xiangshan Trail (5-10mins short jog) which offers a great climb up to the Muzhishan for a FANTASTIC view of Taipei (Took me about 4 hours up and down at a leisure pace so do tackle the trail earlier in the morning and bring water and some light snacks). If you are not so adventurous, the climb up to "Xiangshan Six Rocks" is already a great workout and offers great photo opportunities. The entrance of the trail also has the absolute best Aiyu i have tried in Taipei (it's this sour/sweet jelly drink which is great for quenching your thirst or just refreshing your tastebuds while you eat all the rich/salty/fried food at the night markets. Also really great alternative drink for boba or black sugar milk for people who don't want the calories) which makes for a awesome post climb treat (google for "解解渴有限公司"). I highly highly recommend looking out for this Aiyu specialty store. (Dorothy knows where it is as well haha)
Cleanliness - The apartment was really clean, but not so much if you have an issue with pet fur (Dorothy has a really cute and friendly pet rabbit) but Dorothy really does keeps the place spotless.
Surrounding area - The apartment is not located in the more exciting city area like Shilin or Ximending (but apparently close to Taipei 101 with all the clubs?). It is conveniently close to a Ubike station (I love this bike rental system and used it all the time while i was in Taipei. Just got to find out where you can use it. Quick search on google maps for "Ubike" should do the trick) and Bus stop which both will connects you to the MRT system (which connects you to almost everywhere in Taipei.) The area is also quite close to the Taipei Medical University which offers a lot of food options day or night. If this is your last stop before leaving Taiwan, do allocate plenty of time to travel to Taoyuan International Airport via the MRT system (I gave myself 1.5 hours travelling time, excluding the 3 hour recommended arrival time at the airport for baggage check-in. Trust me, you will need 2-3 hours.)
Privacy - Dorothy is really friendly and will offer you plenty of recommendations and advise if you ask. The room is small but cosy and there are no noisy neighbors if you are a light sleeper.