I stayed at easyHotel London Heathrow for a night, before my flight, in October of 2012.
EasyHotel London Heathrow is located close to Heathrow Airport. So, it's a very nice choice for a short stay before or after a flight to/from Heathrow Airport.
The staff at the reception and, generally, at the hotel were really gentle and supportive.They are very willing to help you arrange your taxi transportation around the city or to the airport.
Even though their rooms are quite small, they have the basics for a short stay. Furthermore, they were very tidy and clean.
If you would like to arrange a short stay near Heathrow Airport at a very low price, easyHotel London Heathrow is ideal for you.

This was a great place to stay after a long flight. Staff were friendly and helpful. It's very basic - no luxuries, small rooms etc. But everything worked, it was clean and has good transport links. If you are looking for somewhere cheap to stay before or after a flight from heathrow and are more concerned about a shower and sleep than entertainment I would give it a go.

I'd been curious about the no-frills easyHotel so I thought that I would try it for one night when flying out of LHR.

To the hotel you'll need bus stand 18 and the Hoppa Bus H1/H8. You must tell the driver b/c it is not a regular stop. When going to LHR from the hotel, tell the hotel front desk that you need the Hoppa bus and it will stop at the front door entrance, according to the schedule at the front desk.

My room was small and simple. Like others have said, it reminded me of a stateroom cabin on a ship, esp. the bathroom. The bathroom shower took some time to become TEPID in the morning. Another hotel guest on the bus commented that his water never became hot even after 5-10 mins. This is something that should be addressed by the hotel. I thought the beds were adequate (I can sleep anywhere though), but I heard others complain about the beds and small pillows.

You can order a simple takeaway bfast for morning or an shrink-wrapped Indian meal in the evening. There is a charming pub (White Hart) a couple blocks away and a convenience store a bit further. I'd advise stopping at the airport M&S on your way to the bus stand.

Wifi is £1.50/1 hr, £2/2 hrs, and £7/24 hrs. TV is free with a £5 deposit on the remote.

For a solo traveller needing a simple overnight near the airport, this is a good deal (£30s). I would stay here again if traveling solo out of LHR.

See my photos.

I had tried to get somewhere to stay at around midnight every hotel I went to was full so I thought to check at easy hotel. I was presented with a male who looked like I had just interrupted his sleep at reception. I was told there is a room and was so tired that I just wanted to go sleep. After paying the fee I was given the key and as I entered I felt like I was entering a prison cell, it was extremely small with no windows surprised they managed to fit a bed in there. Did not even take me 30 seconds to make my mind up. The last thing that made my mind up was when I tried to turn the tv on I couldn't I went to reception ( where I interrupted the male at receptions sleep ) asked him for a remote which he said is £5 deposit gave him the money only to be let down even more as there were no remote controls left ! I told him I was very unhappy with the room and asked for a refund as sleeping in the car would have been more pleasing then that. I was given a number to call the manager on requesting a refund as the male at reception said he could not issue it. I called everyday for two weeks to speak to a manager who was apparently never available once they asked me what it was regarding, and eventually I gave up chasing that money. I would not even recommend this place to my enemies let alone my friends please stay away from this place if you do not want to be left feeling like you are entering a prison and feeling embarrassed and humiliated. HIGHLY UNRECOMENDED