We had an excellent stay at Santiagos and Tonys place during our NYE trip to Amsterdam. They are incredibly fast to reply to your messages and very friendly hosts.
The room is perfect if you just need a place to keep your bags, sleep and shower but also cozy enough to spend some time in on a rainy day. You can also grab some breakfast from their fridge, including bread, ham, cheese, yoghurt, fruits, milk, juice, and of course coffee.
From the apartment, it's only a 20 minute walk to the city center and only 10 minutes to the trendy Jordaan, so you're really not dependent on public transport for the most part.

I can definitely recommend this apartment to couples or friends who want to explore Amsterdam.