We purposefully booked this place b/c, while we wanted a trip to DC, we knew that our kids (2.5 and 5) would find the zoo the most interesting. We were not wrong, and Chris's place was a perfect location. We walked every day to the zoo, sometimes twice. We also took the metro to the mall and did a few museums there.
The apartment fit us well and had everything we could want. Both kids slept on pull out sofas and there were plenty of (very clean) sheets and towels. Instructions on getting in/leaving were thorough. Parking was not hard at all.
If you bring kids, I would suggest bringing food, as most of the local restaurants- while lovely looking- were just a little far for little feet. An uber wouldn't have been difficult, but we stayed in most nights (post another zoo visit of course!). Overall, we had a great time and would recommend it, especially for families with kids on the younger side.