I just got back from an excellent stay at Joel's studio! It's about a 10 minute walk from either the red or orange/blue metro lines. A quiet street, which is great especially considering the lively 14th street / P street neighborhood with plenty of restaurants is just around the corner. The studio is very comfortable (excellent bed!), with a nice patio/deck to sit with a glass of wine in the evening.
Joel will do his very best to make his guests comfortable. He responds promptly (email / txt) to all inquiries; the entire check in and out processes were smooth and simple. For a next trip to DC I will first check availability with Joel again!