I recently stayed at the Best Western...
I recently stayed at the Best Western Incheon Airport for 1 night while transiting from Vancouver to Osaka. I was, at first, pleasantly surprised to find that it was situated very close to the Incheon Airport Hyatt Hotel, as i had previously thought that the Hyatt was the only hotel on airport property. I wanted to stay close to the terminal to catch a flight out the next morning; Seoul is a 45 minute bus ride apparently.
However, the downside is that there are hardly any other businesses or things to do in the area, which made me feel like I was trapped. The hotel was brand new and had only been open about 3 weeks. Room was therefore new and clean and well appointed. Everything is about what you'd expect from a 3.5 star Best western property. Standard room with an oversized TV, a desk and a queen sized bed that was firm. Good, responsive air-conditioning system. High speed internet is available for a reasonable cost (can't recall what I paid).
Ate a traditional Korean meal in the hotel restaurant, which was very good. As I went for a short walk after dinner, I discovered a couple of small mom & pop eating establishments that served what looked like traditional Korean fare. Also there was a convenience store within short walking distance.
Good, basic clean and modern place to stay if you are in transit. If you have more than a day, i would recommend staying in the nearby 'airport new town' or in the city of Seoul.
Hope this helps!