I've stayed in the Holiday Inn on Bath Road and the Jury's Inn. Like EvilDrK says the Jury's is right beside Hatton Cross tube which is dead handy if you want to head into the city. The bed and the fittings were a bit better quality in the Holiday Inn but the Jury's was fine plus the glazing is a marvel. It is on the final approach to one of the runways, so it is mad to see these planes silently making their way in. Also agree with DrK on the bus, found the free bus travel very useful once I knew where to go but it is easier to get the Hoppa from the airport if you aren't sure of what bus goes where (alternatively for Jury's it is a little cheaper to get the Tube to Hatton Cross or just look for a bus going to Hatton Cross as several do). Haven't had the pleasure of any of the other hotels so I couldn't possibly comment.