The Westin Taipei is located in the eastern side of the city. The TRTS (Taipei Rapid Transit System) station is only 1 block away and is well within walking distance. This is a huge advantage over other five-star hotels in Taipei, where many of them don't have access to TRTS.
The Westin Taipei was built only a couple of years ago, so all the amenities and rooms are fairly new and very well maintained. There are many different restaurants serving different types cuisines within the hotel. However, they tend to be quite expensive and the quality of the food is not that great, so I'd recommend that you check out the restaurants nearby. Many of them are really good and a lot cheaper.
Overall, the Westin Taipei is a great hotel. The rate is usually above $150. If your budget is not a problem for you, I'd definitely recommend this hotel!