Orakai located has a good location in Insandong and in the walking distance to line 1, 3, 4 and 5 and has a rich bus line around, so it's easy to access most of any place in SEOUL. And is also in the 15 minutes around the palaces and the Bukchon Hanok Village and another one in Insandong.
The facility is also wonderful, the size is big enough for my 3ppl family and also has wash machine, microwave, oven and all the kitchen ware you need, it's like my second home in Seoul.