We had a really good stay with Sonder! The location was incredible as we were in the heart of old Montreal, and everything was within walking distance of us. There are two rooms with super comfortable beds and a pull-out couch which isn't the most comfortable but a good option for a couple of nights if needed. The whole building is an Airbnb so it feels like you're staying at a hotel. Sonder is pretty inflexible with their check-in and check-out times. You have to pay $25 if you want to check in early, so just a heads up on that. Overall, the place was clean, comfortable and very enjoyable!