I was there for 3 nights/4 days, and had an exceptional time.
The provided breakfast is nice but not great for those with any dietary requirements (1 of our group was vegetarian and the other was vegan, and the breakfast consists of toast, a boiled egg, cheese, and ham).
The room was clean and though the bathrooms and showers are shared they're clean and there are never queues.
The hotel is directly across the road from the famous "I Amsterdam" sign and a five minutes walk from a lovely Irish bar, the club Paradiso, a sports bar, several food places, and two museums (particularly the Van Gogh Museum which is just across the park from you and absolutely lovely!).
You can get the 5 or 2 teams from Centraal Station to Museumzicht which run really frequently.
My only criticism of the hostel is that there is an extremely steep staircase leading up to the front door, and then from the front door to reception, and they are not only steep but also extremely high. If you're okay with walking up loads of stairs (including with your suitcase!) you'll be fine.
You can also store your bags in reception for free and they don't mind.
No curfew and they have coffee facilities to make yourself some until 6pm which is nice!
It's really lovely, honestly check it out!