Location! Location! As others have noted, one of the BEST features of this apartment is its neighborhood -- filled with cool shops, restaurants, rental bikes, etc. We also loved the comfortable bed, beautiful bathroom and clean apt.
Fortunately, I read other comments in advance about the check-in which was not intuitive. I knew enough to leave my husband with our suitcases in front of the apt and I walked over to the 24/7 grocery shop to get the key. We also agree that future renters should be aware of the STEEP stairs to the forth floor. A NY walk-up is one thing but these are some of the steepest stairs I have see in an apt. And, finally, the dripping noise someone else mentioned comes from the pipes in the ceiling above the bed as they contract/expand with hot water. It's kind of like a clanging noise which can be challenging if you are trying to sleep. I'm assuming it may not happen as much if the weather is warmer.
While these are all issues to be aware of, we still loved the apt and we had a fantastic vacation.