This is just a wonderful place to stay. I stayed for a month during the AIRP course that many radiology residents do.
Donalee is a wonderful person and great host, who will make you feel right at home in her home. She is happy to help get you places, make suggestions on what to do around town, and even share some food with you if you'd like. I had not had experience being in an Air BnB that was also occupied by the owner, and was pleasantly surprised. Donalee was around but certainly never "got in the way" for lack of a better description of some people's fears about sharing a space.
There are 2 upstairs bedrooms and an upstairs bathroom, as well as an upstairs living area and patio that are shared between the occupants of the two bedrooms. You and a friend could book together, although Donalee caters to AIRP students so you can also book alone and have the chance to meet a fellow resident you maybe otherwise wouldn't!
The rooms are very clean and spacious. The gold room (where I stayed) has a small refrigerator and microwave. The floors are hardwood and you have your own air conditioner and fan - good because DC is hot and humid at times. Donalee has a great laundry machine she graciously lets you use. She also has kitchen shelf space and refrigerator space she makes available, and you can use her kitchen if needed. There is also Wifi that works very well in all rooms.
Downtown Silver Spring and the AIRP theater are about a 25 min walk, which is quite pleasant. The metro (Red Line) is slightly closer, 15-20 min. It's very easy to get an Uber from her house to get downtown, or you can take a short walk and hop on the metro. If you fly into DCA it is very easy to hop on the metro to get to Silver Spring, as long as you get in before 10/10:30 pm.
I would certainly stay with Donalee if I am ever in the area again!