It's pretty close to the airport. Basically just on the opposite side of where my wife and I have a house. The construction has been going for at least two year's, if I remember correctly.
They hotel is part of a new shopping plaza in Lat Krabang. It's also pretty close to the Lat Krabang Airport Express Station and some other shopping places (Robinson Department Store, Patio Shopping Plaza).
But it is still not finished and not sure when it will open. Maybe in Winter or beginning of next year.