Nicole was an awesome host and her house was literally located at the center of Dupont Circle and in walking distant to most tourist attractions.
We walked to most places (Lincoln Memorial, National Art Museums, Foggy Bottom, etc). There are places you will have to take uber/life/via to get there but most places you can walk to.
The house was cool and clean and really easy to check in. Nicole will send you reminders and messages prior to your arrival so you shouldn't have any problem. If there is, she responds almost immediately.