Do not expect "unique canal views" to be picturesque. It is the tail end of the canal and is mostly trees and other peoples balconies. Open-air-music-festival noisy during the weekend (can only attest to weekend as that's all I stayed) - don't stay with kids as the MC at the event over the canal was swearing and it was definitely loud enough to wake them if you had a window open.
However, stay inside and it is a really nice place. It's small but clean, has a comfortable bed, has pretty much most stuff that you'll want in the kitchen. The owner of the apartment has great taste in books and there is plenty to read. There's a decent TV with a good selection of things to watch, a desk perfect for working on or for a couple to have a bite to eat on. When I stayed over the terrace had a lot of things stored so no space for 4 - 5 people, however if this was cleared away there would be.
Security is good at the address with keyfob controlled access behind big metal gates to get you into the courtyard, then further keyfob controlled access to the apartment block, so guests can feel safe.