Thus duplex us very soaciuis. The two floors in Kelly's duplex are fantastic for larger families or groups of people. You definitely do not feel like you are tripping over people. The kitchen is well equipped. The beds are comfortable.
The only two concerns I had were the loud late night parties on three of the eight nights we stayed. These parties went till after 1 am and till 3 am on one night. The loud music only effected the back bedroom but our daughter could not sleep in this bedroom on those three nights. Kelly did try her best to get the parties shut down. The only other concern is about the location and that it is at the end, the second last stop, of the subway line. This is our second trip staying in Brooklyn and commute into Manhattan and Queens (for Mets and US Opens) took a really long time) took substantially longer than our previous visit.
Kelly is a responsive host so if you want a good price for lots of space then this is a great place to rent. If your prefer a quiet neighborhood or faster commute then this might not meet your needs. We would give it a 6.5 out of 10.