In case I'm not the only one this wasn't clear to: Sonder is more like a hotel business, where you'll go through their own platform to confirm the booking and communicate thorugh. That wntsild a lot of extra hassle and cost for me, as I had to call an international number to get in hold of them. As well as use their app etc. They do not answer messages through airbnb. The apartment was great, but much more so for four, rather than five people