I've been coming to the Las Vegas Hilton for years for conventions. It's definitely not a stylish Strip hotel, but in the past the rooms have been clean and spacious. Not this time. I checked into my room only to find that it had not been cleaned. There was hair in the bathroom. Garbage was still in the trash cans. There were crumbs on the table and the bed had been laid on. In addition, all the drawers were open to the dresser. When I called down to the front desk they didn't believe me at first saying "my computer indicates that the room has been cleaned." I told the front desk that they could come check it for themselves. They did bring us a key to a new room, but it was in a far wing and not a real upgrade or anything for the inconvenience. My other gripe is that half the restaurants (Noodle bar, sushi place and the Mexican place) were closed during the convention. Seems like a huge missed opportunity for businesss. I also asked about a show they have and the front desk was clueless as to what we were talking about even though it's advertised throughout the hotel. Now that the convention will be moved to a different hotel, next year I will not be coming back to the Hilton. This places desperately needs a makeover. It's a tomb. There's nothing going on here ever.