You need to ask if there is breakfast because when we were they stop doing it, you need to ask which room is available because there are some with a view and some with no view, and there are some with 2 bunk beds and some with 1 bunk bed and a double bed! So if you ask all of these you're going to be good! The place is nice, has a bit of a funny smell but you get use to it in no time! Is a little bit far from the center but i think thats good so you can sleep good without any outside sounds... And it's really well connected with the city center! 5 min walk and you are in a tram that goes in 20min right in to the heart of amsterdam! I didn't met micheal but i met his wife and she is a really lovely person!
If you have a light sleep i don't recommend this place, because you can here everybody in the house floor, even if they speak really low you can here their hole conversation.
Last but not least you need to ask which rooms have a private bathroom because there are some that has no private bathroom and if you are in a rush you have to think of at least 5 people with 1 bathroom!