Our stay in the room with the roof light was really good. Martin was there during our stay; he's really nice so it was pleasant to have him around. The check-in was easy and didn't have any problems during our stay. The room was big enough, with a comfy bed, and it was good to have a desk and space for our clothes. The room is light, but may be a bit noisy with there being an internal high level window to the living room; Martin has loads of ear plugs though so no problem with sleeping.
Definitely enjoyed the view from the roof (despite being afraid of heights I got down too..) and the location was great - only a 5 mins walk to the other side of Grand Street, with lots to do in Williamsburg. Would recommend staying here!