As one time residents of Tianmu we liked the location. Over a few days we walked to the National Palace Museum, the hot springs behind Tianmu park and to the park and Ecological gardens at Zhishanyan park.
The flat was clean, accessing the kitchen and bathroom toilet through the bed room could be problematical with larger parties but with just the two of us it wasn't a problem.TV, washing machine, dryer, air conditioning etc all worked fine.
It is close to a market, a large department store and the red line of the transit by walking down Dexing East Road across Zhung Shan Pei Road and down Dexing west road to Zhishan station, a ten minute walk at most.
We found a good Doh Jan shop on Zhung Shan Pei Road and had good and cheap breakfasts there most days. The hot springs on Xingyi Road are good and a taxi is NT$200 from the flat.
In all a nice flat in a good area of Taipei.