I stayed at this hotel prior to a flight back home to Oman. I have stayed at this hotel a number of times now and it really is very good value and handy for all the main Heathrow terminals. The rooms have been refurbished in recent years and are perfectly acceptable.The carpets and the décor in the hallways and floors is a bit funky but you soon get used to that.
I usually get lounge access and if you are into plane watching it looks directly onto one of the main Heathrow runways and provides an excellent view of the planes taking off.
The other hotel I usually stay at is the Marriott at Heathrow but that is a fair bit more expensive than the Renaissance and although good, I think the Renaissance is better value.More