Great base. Slightly far out of the city, but we used a transport pass and we got everywhere with ease. Even when the storm halted the trams and trains. Then it was a definite advantage being on a bus route to the airport. We also purchased a museumkaart rather than the iamsterdam card as we were there for 6 days and it worked out much better value.
The apartments were clean and spacious and had everything we needed for our stay. The staff couldn't have been more helpful, particularly checking up details of the buses when the trains to the airport stopped during the hurricane.
I love Amsterdam!