It's a totally great place to check-in if you want to save and if you are okay with sleeping in a bunk bed with other people. I thought I was going to be okay with sleeping in the room but being on the heavier side, the space isn't just big enough to relax in, and I was constantly worried about waking my roommates. I think this kind of setup is better if you are a group of friends, so that you are more relaxed.
Having said that, other aspects of the place is great. Having a park just beside it is the best thing about it, in my opinion. Their in-house restaurant also offers great food and drinks.
If ever I'm back in Amsterdam, I will probably check-in again here but I will get a private room to myself.