Crown Plaza have always been good hotels and this one has an excellent location for excel but the rooms are noisy.
Unfortunately the hotel is on the landing and take off path 1 mile from London Airport. The fact the double glazing didn't seem to work, either to stop a breeze (I don't mind the cold), or any noise from outside meant very little sleep.
The receptionist noticed my state the following morning and I explained the issue with the double glazing. They told me they were sorry and would arrange a token gift of 5000 points and would also email through my invoice. I didn't receive either.
If you can sleep in noisy environments then go ahead otherwise you may want to look elsewhere. The bar was pretty good and so was the food. It has a swimming pool and gym but I was too tired the following morning so didn't get a chance to try.