We stayed at the Stayokay Vondelpark for 2 nights in Amsterdam.
The hostel offers great views to the park (since it's almost inside Vondelpark).
It's located in a great place, but we had a little trouble to find it, because our map was not acurate. From here you can walk to some bus stops that will take you anywhere in the city (even the stop to take the bus to the airport is close to the hostel).
The staff of the hostel was very helpful and friendly, we had no trouble during check-in and check-out.
The only problem we had was with the heating system of our room, and this is the only reason I'll not give this hostel a 5 star rate. The heating did not work at all, so we had to face two nights of 7º C (44º F), without heating. We complained several times to the people at the front table, and they always confirmed they were aware of the problem, and that there was people from the staff taking care of it. Well, there was noone, and we were freezing our bodies inside the room for two nights. Taking a shower in that temperature is a terrible experience.
The area in which we stayed was served with elevators and the stairs were large, with a good step size. The place also had a laundry room, for what they charge you some coins. The machines work great. The bar and the commom areas of the hostel are, also, the best we saw in our whole trip. The wi-fi works great in these areas, but it will not reach the bedrooms.
We stayed in a room with 6 bunk beds. Every bed has one assigned lock of good size, in which you can store your stuff. The room was very large, with lots of windows to the park (this was great for the view, but made the room be even colder during the nights).
The room also had a bathroom, with 2 showers.
The place was kept very clean all the time.
The breakfast that this hostel offers was the best one we had in our entire trip. It has a lot of bread tipes, yougurt, juices, coffee, tea, cereal... It was really a great surprise.
We really liked our stay at Stayokay Vondelpark, and we would recomend this place. Just make sure the heating system is working properly.