Pros - great location, friendly staff, lockers in the room, generally clean. The view of Stockholm is particularly stunning
There's a chill out room and a kitchen which is well equipped. Not super cosy but does the job
Cons - not enough toilets it seems
Some of the lockers are broken of you want to arrive early before checking-in and if all the working ones are taken..
This was the case for me but bedroom 6's door lock didn't work at all. Anyone could come in and out as they pleased.
Finally - I don't remember this being mentioned in the original description but you do have to pay 50 krona in addition for bed linen. I've stayed in other places in Stockholm and Sweden where I didn't have to and found that quite unusual to say the least.