Courtyard Taipei is at the Nangang station, a bit far distance wise from the main attractions, but extremely convenient as both the MRT and the HSR stop there. If you take the HSR you can be at Taipei Main in about 8 minutes; on the MRT it’s closer to 25 minutes. Like many MRT stations there’s an attached mall at Nangang, but there’s not a lot beyond the mall in the immediate vicinity (or at least in the distance you’d want to walk in the heat of summer).