Matthew's place is a great spot for a single traveler or a couple that want to stay in Williamsburg. It is a great location and you're walking distance to so many things, including a couple of Subway stations, Greenpoint and so many great restaurants. It is an embarrassment of riches: many coffee shops, meat stores (old school and new school,) pizza, ramen, Italian, Korean, and lots of other things I didn't have time to try. (All places I walked to.) And Anthony and Son's sandwiches is right across the street. There are a number of bodegas nearby, so you can also get whatever you need at almost any hour of the day. And there is everything else Brooklyn has to offer.
I visited in the summer and had concerns about the heat, but the AC in the place was great and when it cooled down, you got a GREAT breeze through the place. Good size space, with furniture you can actually use (table/couch/desk,) and a nice Roku TV that you can use to stream whatever you want. It is a third floor walkup, so that may be a dealbreaker for a few people, but it is fine for most.
If you want a fancy boy Manhattan high-rise experience, this isn't the place for you. But if you want a spot that feels like you borrowed your friend's place to visit NYC while they're out of town, this is for you. Comfortable, great location and a good value.