The hosts are very responsive. The apartment itself is quite nice - clean, strong wifi, well appointed kitchen and bathroom, etc. - but with one issue
Outside noise filters in easily- the building is located near a bustling party street, and is situated at the corner of a small park filled all kinds of loud and drunk folk. You might hear noise until 3-4am, made worse by the house rules to be quiet past 8pm.
That said, the apartment is centrally located. Easy walking distance to old Montreal, and to fancier parts of town (where the Ritz, Holt Renfrew, museum of fine arts, and upscale restaurants are)