Location, location, location. This apartment is very central, with everything you need at your doorstep. Excellent brunch spot a few feet away, and all of the major sites are a short walk away.
The apartment was clean, albeit quite small (especially the bathroom). There is essentially no place to put your toiletries. Not a big deal though for a few nights.
The biggest downfall by far is the noise. It is extremely noisy, even going late into the night. At around 1:30 am every night there is a very large garbage truck that comes and beeps very loudly and wakes everyone up. Our last night was particularly difficult, after some heavy rain, a truck was outside the apartment through 4 am. It was so so loud (and I live in NYC so I can tolerate noise).
All in all, a good stay, with exception of the noise. Communication and checkout with the host was easy. Just be prepared for the noise, and bring some ear plugs.