I have to say I was a little surprised when I started reading this thread, bu then I noticed when it was originally posted. I stayed there in August 2004 and while it's not the best that Hilton can do I was perfectly happy. It's one of those hotels that's more like a Garden Inn, but as I recall it was clean, breakfast was good, we even ate there in the evening and that was good too.
Great location, as close to the motorway, but there's no noise, and close to Warwick Castle ... although I'm sure there are more convenient "local" hotels if that's the only reason for going there.
Can't remember much about the room, certainly it didn't register as a place I wouldn't go back to.