Ellen was the perfect host. We booked her apartment well in advance and she was extremely communicative leading up to check in and throughout our stay. The location is ideal for doing just about anything in the city, especially if you want to duck away from the energy and hustle of Amsterdam's core farther north. The Metro station is a 5 minute walk away, making it easy to get anywhere fast if you want a break from walking. In terms of walkability, the apartment is a 20-30 minute walk, at most, from major sites and points of interest. If you can, bring a great pair of shoes and explore all the small side streets, shops, and sights outside of the major thoroughfare that attract crowds. We were in Amsterdam for the Dutch GP and relied solely on public transit, especially to get to and from Zandvoort. The NS train system was experiencing a widespread strike when we arrived and Ellen was helpful in pointing us toward information on the strike schedules - thankfully the strike concluded a day after we arrived.
Overall, the apartment itself was wonderful. It's cozy, quiet, and has great views of the adjacent canal. AC, a fridge, and espresso machine are huge plusses, as is the ability to cook on the small range. The only minor surprise was the actual size of the apartment - it is very small and makes very good use of limited space, which may be hard to fully understand from the photos, especially thanks to the massive floor to ceiling windows (which are wonderful). If you're traveling as a group of two with luggage, be sure to use the closet space to store bag and clothes.
If Ellen continues to list the apartment, we will definitely be back!