Hotel and room was very clean, well presented, perfect size and the room was more than adequately kitted out. Wi-Fi is free and worked very well. Despite being in the center of London, the location was very quiet at night and very reasonably priced. We booked this hotel because we was eating at Elystan Restaurant which is just around the corner - well worth eating at.
FYI. Unlike most other hotels, with Sonder there is no reception. Before your stay you need to provide online photographic ID of yourself (passport or driving license) as well some other details. You have to do this otherwise you will not be sent the pass codes to enable you to gain access in the hotel and your room door.
There is no parking at the hotel. On the roads around the area its parking permits only until10pm. There is a small underground carpark a few minuets walk away on Sloane Ave. Cost us £28 from 6pm to 10am.