A nice place to stay if you have a good handle on how to use the transit system. One minute to the bus lines, which take you to Hounslow West train station. From there, you can take the Picadilly Line into London. Or go the other way straight to Heathrow.
BTW, if you plan on travelling around a lot, my recommendation is to get the London Travelcard. (from this location, you'll need adult zones 1-6, a 7 day pass is £64.20, which is what I got, but if I remember correctly, there is a 3 or 5 day pass.) The Travelcard is better than the Oyster card, because you pay one time and it includes all train lines and any bus. The Oyster card works the same way, but you have to replenish it as you go (with your credit card). This can be troublesome if your balance gets low and you are not near a refill station.
As for Daz's place, it is nice and quiet, and the family is very hospitable. The rooms are up a narrow and somewhat steep stairway, so if you have mobility issues, this is not the place for you. But overall, a good value. The house is in a little town called Cranford. If you take the bus to Hounslow West station, be prepared. The area around the station is filthy, especially across the street, where you catch the bus back to Cranford. In the town of Hounslow (a couple of bus stations towards the East), there is an open air shopping district. The usual stuff is there, average run of the mill. However, there is a great restaurant called Turkish Sofra there, which I found surprisingly good. Otherwise, head straight for London.