Days Hotel & Suites by Wyndham Incheon Airport allows you to disconnect from the airport, connect to a local near airport Korean community, without loosing connectivity to Seoul or the airport. Directly in front of Unseo station, it allows you to ride one stop from the airport and then use this quiet neighbourhood as a base to explore Seoul at a reasonable cost. All required conveniences are nearby, and the area is quiet, allowing you to catch up on sleep. This is one of my go to hotels when I travel to Seoul.
Room was a bit older, smellier (musty and humid), and smaller than I anticipated from the photos. That being said, the proximity to the arex and short journey time to both terminals at incheon is unbeatable.