Greg was an excellent host; he responded quickly to any questions or correspondence from us, even emailing to check we were OK on the date of our arrival as he hadn't heard from us. We found it relatively easy to get in and out of the centre of DC from the house and preferred to use the buses as the stop was just 2 minutes walk away. The house was very large and well equipped and of a very high standard. It was about 5 blocks to the road that contained a number of shops, bars and restaurants and a large supermarket.
It is an up-and-coming neighbourhood so, whilst Greg's property is top-notch some of the surrounding properties are not - not a problem, just helps to set expectations.