Valeria's place is a walk away from the historic center. I didn't use a public transport because I wanted to take my time and see the city and I wasn't brave enough to bike around the city after seeing how much traffic there is in the bike lane, but if you choose ether one of these options you'll reach tourist attractions in a heartbeat. Staying at her place, you really get an idea of the way local people live their lives in the city of Amsterdam. The neighborhood is quiet, and the people are friendly. Nearby the apartment there is a market where you can buy fresh fruits and vegetables (there is also a vegetarian food stand where you can find some really tasty falafels). Walking a few steps from the apartment you'll find yourself in front of a canal. We loved seating in the bench and enjoying the view in the late afternoon.
The apartment is lovely. There were four of us and we slept very comfortably. The apartment had everything we could ever need (towels, shampoo, tooth paste, toilet paper, hair dryer etc the kitchen was fully equipped and we could find there coffee and coffee filters, sugar, salt, pepper, oil, different sauces, rice, oatmeal etc) so I recommend doing an inventory of what's in the apartment once you get to Amsterdam, and then do the grocery shopping later.
Everything was very clean and easy to find. Valeria was very friendly and the check in was really easy.
We loved staying here and we would probably stay here again during our next visit in Amsterdam.