Astor Museum Hostel is great. The room was exactly as pictured, and so were the community spaces. The hosts were extremely helpful, had great ideas and advice about places and transportation, and were just lovely people!
The variety of guests staying at the hostel make for a special experience. Everyone was so nice, respectful, and the community aspect of the living space was actually quite peaceful - plus, if you're traveling alone, it's great to go socialize at the end of the day with other travelers.
The rooms themselves were pretty tidy, as well as the shared bathroom/shower rooms - and the kitchen was well taken care of by both the front desk and the guests.
My favorite thing about the location - after the people inhabiting it - would have to be just how central it is. It was pretty safe to walk about after dark, and there are two different Tube stations within walking distance.
I had a great stay - definitely would do again :)