Bowery is a noisy unattractive street and the street entrance is covered in graffiti, but a lovely spacious apartment awaits you once you've climbed up the three flights of stairs. I loved this place and the location and would stay here again without hesitation. My wife is a sensitive sleeper and the street noise from Bowery bothered her so much that she had to sleep in one of the twin beds further away from the window. So, while this place isn't ideal for sensitive sleepers, I would say that no low rise building in Manhattan is going to be good for sensitive sleepers. They'll probably only be truly comfortable in a high rise. We did manage to mitigate the noise problem by turning on the window unit and running a white noise app from my iPad. That actually helped to drown things out quite a bit. Also, there was construction going on while we were there. I imagine the noise situation will improve once that construction is complete.
I loved the location of this place. Once you get off Bowery, the neighborhood is a joy to walk around with many fun shops and restaurants. Pretty good access to several subway lines as well. I would definitely stay here again, but my wife might not.