Had to stay here when snow hit Heathrow. Very cute for the price. Staff was very accommodating. Food was very good too (they have a restaurant and bar). You could do a fixed price meal for 20 (2 courses) or 25 (3 courses) pounds.
Be careful getting to the hotel - the black cabs at Heathrow will charge an exorbitant amount to get your there (35 pounds). However gettting back is only a 12 pound taxi that you can actually charge to the hotel if need be.