We did not stay at the Airport Palace but we stayed at the Satellite Palace in Ostia and it was undoubtedly the least desireable hotel GCT has ever booked us into. However, it is just one night and you can be sure that the other hotels for the tour will be better. If you have researched the other hotels for the tour you will know that they are not five star, not four star, but what we would probably call three star hotels. They are clean, comfortable, but not posh. You will not stay in the same hotels that were used by the tour group I was with, but I'm sure they will be comparable. For us the hotel in Rome was good, as was the one in Monticatini (Tuscany). The hotel in Sorrento was great. Please don't let the first night detract from what will be a very enjoyable tour.
Come to think of it, there may not be anything better in Ostia.