We stayed here before flying out to St Petersburg for a long weekend, booking a room and 4 nights valet car parking package. Arriving was very easy, just leave the car in a pull in right outside reception and the keys with reception. The car is then whisked away and parked for you.
The hotel is modern and stylish and much more pleasant than many airport hotels. Our room was large, comfortable and well equipped. I can't understand a previous review suggesting a charge for the TV, unless you wanted to watch "Pay TV".
We ate dinner in Brasserie Roux, and found the food to be extremely good, with pleasant and efficient service. Not cheap but good quality. The hotel is connected by a covered walkway to Terminal 5, so getting to the airport, and back, was easy. On returning we called the valet parkiing service on collecting our bags, and by the time we had walked back to the hotel the car was waiting for us outside reception, with a courteous driver waiting to hand over the keys.
So a good pre travel experience, no problems, no complaints. A quality hotel, with efficient service throughout.