I stayed at Joel's place for a couple months this summer during an internship in the city. I had a great experience. The studio is even nicer than advertised, and Joel will go above and beyond to ensure that you are comfortable.
Should you stay here, you will not have to worry about anything. All the essentials are taken care of, and Joel includes nice touches like extra phone chargers, a bevy of cooking utensils, and neighborhood recommendations in the studio. He was also quick to accommodate anything else that came up during my stay for the summer. The location is excellent and feels very safe. I would certainly stay here again.
I could go on for a while about how great the stay was. The studio is great, and Joel's place will be the first one I recommend to anyone staying in DC. You'll have a great time if you stay here. Joel is also great to talk to and is an excellent host. His family is wonderful too. As someone who had not spent much time in D.C., I felt right at home staying here.