Rudolfs Apartment is very cozy. It is quite small but you still got all the space you need. It is located next to a tram stop, which takes about 10m to the city centre.
I would even recommend renting bikes, you only need about 15-20m to reach the centre. Alongside with the high flexibilty, it is a really exciting experience to travel amsterdam by bike.
Rudolf was very kind and helpful and he responds nearly immediately to text messages. I highly recommend this place and would definitely stay again.