Sonder appears to be a rather big company rather than an individual owner so don't expect quick responses. It operates like a self-check-in hotel with staff located in Philippines hence there is not much flexibility as to early check-in or late check-out. Nevertheless, we loved the place; very clean, modern, great location, equipped with all you can ask for for a weekend we spent in Montreal with a couple of friends. Highly recommended! We would come back anytime.