Pros first: The unit was exceptionally clean and neat when I checked in. Check-in was flawless and quick. The bathroom is gorgeous, the shower and products provided were great. Towels also were good quality. WiFi was fast and TV of good quality. The building was also (mostly) quiet and didn't interfere with my stay.
Cons: The bed, pillows, and sheets left a lot to be desired. The mattress felt low quality, and the pillows were extremely hard. I had trouble sleeping, and wound up with quite a few aches and pains. The kitchen also lacked enough pans and cooking tools to cook a real meal in. Maybe pasta and coffee is doable, but not a real meal.
Overall I wouldn't hesitate to book another Sonder location, as my stay proved to me that they know how to run a good business and care about their properties. This unit, however, wasn't the comfiest with regard to actually relaxing and sleeping.