Hotel Diamant is close to the airport. That is it's main attraction. It is a long walk, doable if you know where you are going. The cab ride is not bad, about $4 as I recall. The hotel is not obvious from the street unless you know Korean. There is no English sign, and it sits back off the road in a cluster of other buildings. I figured it out when I realized that Diamant is actually a misspelling of Diamond, and that a blue and red geometric symbol on a building likely was meant to be a diamond.
On arrival, I managed to check in and get to a dark room down a dark hall. The room was functional, and adequately clean, but not more. I was impressed by the large can of insect spray left with amenities such as shampoo and men's aftershave.
I arrived around 2100 with no need for food, and left around 0600 the next morning, so I have little to report about the the general facilities other than it seemed everything was mostly on par with the room. If one just needs a place to crash that is close, this is okay. There is a coffee shop nearby and with a little wandering one could find meals. I think one night would be plenty though.