This hotel is just next to Insadong where many restaurants, boutiques, palaces and old wooden houses are in walking distance. It is near Crown Hotel which is more expensive and not as interesting.
It is very clean, has a huge tv screen and a computer in the room ... it was difficult to change the corean keyboard ;-)
The staff is very nice and you can make yourself toasts and coffee in the morning in a small kitchen.It is very well heated.
For sure there is also a very nice hotel in that area with a great buffet breakfast, Doulos Hotel, almost the same price but it was full when we tried to book, so Biz Hotel is a very good alternative.

Location is great. Near Subway exit #5 and the bustop to catch the airport bus is just further down the road in front of McD's. Plenty of inexpensive delicious local food shops / stalls around. Very near to the main city attractions & it's not expensive to take a taxi to any of the locations of interest if you choose not to walk. The hotel is painted in an unconventional style which looks rather garish, with splotches of orange on the walls of the hallway leading to the rooms (first impression was rather worrying - thought I had booked into a rundown/ seedy hotel) but found the rooms exactly like the pictures , it was very clean, the beds were very comfortable and they provide all necessary amenities except that the towels have seen it's day - they were grey with age . The size of the rooms was rather tight for a tripple share room (we didnt have space for our luggages). The simple breakfast of bread, jam & butter , coffee or porridge was adequate. Hotel staff speak fairly good English, were exceptionally helpful and cheerful. For the price I paid, I would consider staying here again.

I arrived at the hotel after flying 12 hours from London and I had some difficulty in finding it. I had to ask help to some locals. Anyway, after the first time you can see that the hotel is well indicated and very easy to reach (especially if you get out at the right exit of the underground).
I spent three nights there and the price was very cheap.
One of the most appreciated thing was that there was a PC in the room and so I could use it any time I needed (and so I checked the timetable of train, the timetable and map of several attractions, checked that my plane had no changes, etc.).
The staff is very friendly and even if their English was not perfect they helped me with a map and giving me directions.
Anyway, the breakfast could be improved because it is very basic (you can serve yourself with some toasts, butter, marmelade, milk, the, juice, etc.) and you have it in a quite bare and very hot room (and it was winter!).