Besides the very tasty and varied craft brews on tap, what makes this place extra special is the outdoor rooftop seating with royal views of Taipei 101 and the city skyline. It's a prime location if the weather is good; otherwise the indoor space is cramped, with a weird sports-bar vibe and service below par for Taiwan.
For the entrance, look for the lifts next to H&M, head to Skyline Park on 4th floor.