My friend and I booked this last minute for a city trip and it was amazing!
From initial communication to check-in to check-out our experience was great! Everything was in order and clean, the appartement itself has an amazing view. It can be a little loud when a tram passes by but this is only if you are on the balcony. The windows/doors to the balcony are really large and block all the noise so it's still sleeping like a baby.
A heavy recommendation for anyone looking to stay in Rotterdam!