I highly recommend Greg's place for the causal or business traveller. Greg's place is perfect for all types of guests, like those going out to eat for quick or fancy bites or those, like me, who prefer to mostly cook for themselves. Greg has a well-stocked place for a temporary home. The selling point for me was tupperware. I was able to prepare food for the morning and take my lunch to work, thus saving money and making my busy time in DC easy on my wallet and diet. As someone who travels frequently (about 50% of my time), it's important for me to be able to come to a place and set my routine quickly.
There are no keys to hand off as everything is digital code that is specific to you. Though I never met Greg in person, he was always responsive.
I will definitely be booking Greg's place when I return to DC for work.