I feel like this band has found like the perfect balance. The members all appear really close, they all blend together well. The members who play instruments are incredibly talented and managed to adapted to a range of styles, they're also vocally talented and can maintain a high energy (I mean Jaehyun get's the prize here but Chan Hun and Kwangjin also do amazingly) which is difficult to do whilst playing an instrument. Meanwhile their vocalists are both amazing and really diverse, Seunghyub has a really rich raspy quality to his voice and can give the rougher sound a lot of the more punk/rock songs need. Plus he can rap really well. Hoeseung has a really clear and stable voice that has AMAZING falsetto while also managing a pretty solid range. Honestly, this band could make music of any genre and suit it perfectly because they're so multi-talented.
I like how they look at each other as they play/ sing, especially Jaehyun at the back. You can really feel their chemistry as a band, thus producing such quality performances.