I came to Taiwan to study Mandarin at NTNU MTC (師大語言中心) The location was great as it's less than 5min walk to the school, you have the night market opposite and the MRT is 5mins in the other direction.
I lost my keys during the Lunar New Year, a time when everyone is on their break. Kiki was really great and responsive, I'm really grateful for that.
I highly recommend this place for anyone planning to study here in Taipei.