Took my teenage children for 5 night "spring break" Easter holiday trip to NYC, and have to say Box House was great choice. The hotel provided good space, thoughtful accommodation (beds were extremely comfortable, it did get a little hot up in the loft area but we used the ceiling fan) and attentive staff (housekeeping seemed to tidy up room every day and May always gave good advice).
The area adjacent to hotel is very "functional industrial" in both look and feel, but given that most visitors (I’ve assumed) will be like us, hotels are just a base at either end of your day, so don't be put off! The soon to be finished building work will see a new reception and restaurant installed, which will, I’m sure, only add to pleasantness of guest visits.
As already extolled by other guest reviews, Box House really is closer to everything you need re sightseeing just across the river. Our first trip out was via East River Ferry ($4), that docks not too far from hotel. It took us all the way downtown to Wall St and was a picturesque delight. Best views of the city ever and closer to those monolithic bridges as one would ever hope to get.
Brooklyn itself is exciting location to explore (check out the Saturday Flee market), Williamsburg, Greenpoint and Atlantic Avenue neighbourhoods for some fabulous eateries, shops and people watching. It was a relief not to have to head back into Manhattan for dinner (although we did occasionally pick food up from Wholefoods/Trader Joes and eat in, delicious meals and the hotel has most of what you will need to utilize within the kitchen area).
The Box House vintage cabs are a useful touch, they will drop you off and collect you within a mile or so radius. Do tip them, Singh, Louis et al were friendly drivers.
In conclusion, we were very happy with hotel, location and service. We wish Box House well with its expansion plans (do make sure to serve pancake stacks for breakfast) and thanks for the fruit at the front desk every day!