The room has almost everything that you would need for an overnight stay, except for a mini-fridge. However, there is a large fridge in the basement that the guests are welcome to use. You put your things in a bag, write your room number on a card, and then tape the card to your bag.
For a limited time in the morning, they offer a make-it-yourself breakfast: toast (you toast the bread yourself), coffee, yogurt, corn flakes, milk, and bananas.
In the room in which there is breakfast, there are two laptop computers with Internet access. (There's also wi-fi in your rooms; they give you the code.)
You'll easily be able to find restaurants, but that's true of everywhere in Seoul. The real advantage, if you're a tourist, is being very near the Jongno-5-ga subway station. This is because from the Chongno-5-g subway station, you can go almost anywhere fairly easily: Jonggak, Yongsan, Daehangno (Hyehwa), Hongdae, Myeongdong, Itaewon, and Gangnam.
Here's how you get there from Chongno-5-ga subway station: Go out Exit 3, take the very first right, and walk for a few minutes (through a red-light district). Don't worry about walking through a red-light district, though. Seoul is a very safe city, even in those kinds of areas.
If you have some kind of walking disability, you might have trouble getting up the stairs to the higher floors because they have no elevator.