This hotel is a good, decent price for a short stay at Gangnam. The bed is large enough, the room is clean, and the mini-bar is free.
The staff was good for me; they don't speak English, though.
The only complaint for me is that the room is bad at shutting out noises. At the room next to me, a voice was heard from a Japanese couple on the bath, and while I had a bad feeling about it, a few hours later the Japanese woman started to moan on the bed, and I couldn't go asleep. They continued to do it for 3 hours! That is so unpleasant...
Another complaint is a little bit of stink, but I can accept it.
But overall, the hotel is good and I recommend if you look for a decent hotel at Gangnam.