PROs: cheaper than Hampton by Hilton at GDN, new and very clean.
CONs: radiators where off when I checked in, while it was freezing outside. It took a few hours for the room to reach a comfortable temperature. Inconvenience of having to go downstairs to make a tea or coffee (no kettle in the room). Also, insufficient quantity of cups, spoons, etc. downstairs. Lack of interior door locks raises security concerns (anyone with a code can enter). If you have an early flight in the winter, you have to take a taxi to the airport anyway, because the route is not walking-friendly in bad weather conditions. So you might as well consider hotels a little bit further from the airport. I didn't feel particularly safe in a hotel where there was no staff on-site.
Overall, I don't think I would book there again.