The most important consideration for us was the location - walking distance from the departure gates of Terminal 5 at Heathrow. We were pleasantly surprised to find other benefits:
- The hotel was well-signposted and easy to find from the motorway
- Parking was plentiful, spacious and well-signposted
- Staff were kind and helpful at check-in
- Rooms were spacious, immaculate and comfortable
- Restaurant - the more casual one - had interesting food, well cooked and with efficient staff.
All in all, not cheap, but worth the money, and I have already re-booked!