A great hostel, in a top area. Hongdae is really a good place to stay at. Lots of different kinds of restaurants, shops, street activities and close to Seoul Station (10 min by metro).
The hostel has a beautiful quiet modern design, it is very agreeable. The staff is great, we had interesting conversations with Sam, a student who speak excellent English (and apparently also at least some Chinese and Japanese). The rooms are decently nicely sized for the price, everything is clean, and convenient. We'll surely think of coming back for our next stay in Seoul.