Check out the reviews on TripAdivsor:
https://www.tripadvisor.com/Hotel_Re...t-Incheon.html
In case you're leery of reviews that are too good to be true or too bad to be true, look for 2, 3 or 4 star reviews and ignore the 1-star and 5-star reviews.
Wyndham Rewards has way too many properties worldwide, so most FTers have not stayed at any significant fraction of them, so looking for reviews here is not likely to meet with success.