This place is clean, comfortable and convenient. Carol is an accommodating host. When a couple of unexpected circumstances came up during our stay she went above and beyond for us. The description of the space in the listing is accurate. The bed was comfortable and we had all the amenities (as listed) we could need. In spite of it being on a busy street, noise was not a problem at all. (And we were there during the VMAs at the Barclay Center!) We had the air conditioners and fans running during our stay so I couldn't say if street noise is audible or not when AC is not running, but the apartment is in the back of the building so I'm guessing it would be fine. Off of Flatbush the Park Slope neighborhood is bustling with shops, coffee houses, and so many wonderful restaurants. (We wandered over to Convivium Osteria our first night there...incredible authentic Italian!)
The front facade of the building is definitely not Instagram-worthy but the convenient location more than makes up for the lack of exterior aesthetics. We took the subway every day to Manhattan and to other parts of Brooklyn. Between the Atlantic-Barclays Ctr. station and the Bergen St. station - both so close - we were set. I know from other Brooklyn stays that getting off the subway exhausted after a long day of walking and site-seeing, and still having to walk multiple blocks to get back to your AirBnB is rough. Here you have less than a 5-minute walk to get "home". This is a huge plus!
The building is old and with that comes aspects that some may find less than ideal, but for me personally these were trivial: multiple keys to get in to the building were a bit of a hassle but made us feel secure, air conditioners built into walls so heat exchange was happening in the hallway outside of apartment but we were cool and comfortable inside, shower was a little slow to drain but shower pressure was great.
Overall, I highly recommend staying here!