Laila's apartment is located perfectly to get to the National Mall and all its attractions! (ten minutes by foot to the nearest subway, then just a few stops away). Though it is a busy street outside, it seemed to be pretty safe. The apartment was clean and great for spending a few nights.
If you are a light sleeper, you should be aware of the busy street outside the bedroom's window. It can get a bit noisy. But that is to be expected by large cities. For us it was not a problem.
Also, you cannot change the temperature in the apartment (I guess the a/c dial is in the separated upstairs apartment??) It was somewhat cold at times and the upstairs neighbors got noisy one evening. All in all it was acceptable though.
Laila's place is great for couples looking for a place to sleep so they can explore the capital for a few days!