The hotel was clearly quite new. My room was large, pleasant and comfortable; as a solo female traveler, I felt secure. Reception was manned by a friendly, alert guy who dealt with my check-in efficiently despite the fact that I arrived less than half an hour after making my booking. Housekeeping came by daily.
It is a 5 minute walk to Beomnaegol Station - the lift down to the station is next to the stairs, for those with lots of heavy luggage. From there it is ~3mins by subway to Seomyeon Station or a ~15min walk to the heart of Seomyeon. Personally I always walked; it never felt far.
There are 3 convenience stores between Beomnaegol Station at the corner and the hotel, so you'll not want for any snacks or last-minute necessities.
Although I don't read Korean my understanding (from interactions with Reception) is that the hotel has an hourly rate. That said it wasn't dodgy; I saw a family of 4 in the lift and never heard anything from my room except footsteps. Would absolutely stay again.