We had a lovely stay in the apartment – it's walking distance from the canal with great little shops and bars, and a good jump off point for places farther afield. We walked to the river and the Louvre, and also up to Montmartre within 30 minutes on foot. Lots of cute wine bars and restaurants in the area too.
The host was very responsive and helpful, and the apartment was nice and clean, tucked up into the roof of the building with plenty of character. My only suggestion to the host is to provide more than one set of keys – there is no way to let anyone in to the apartment other than going through 4 doors and down/up three storeys of stairs. In an apartment that sleeps 6 people (we were 4), it would've been great to have an extra set of keys (at least!), so we didn't have to keep running up and down every time we needed to let someone in if we didn't all go out together.
Thanks!