I had a very bad experience.
After booking I received communication from the host, with the understanding the access code would be sent the day of the booking.
I reached out to the host via the app and telephone few hours prior to my arrival for the code, without any response.
Once I arrived, I was still unable to get hold of the host for hours. Ultimately having to contact customer support and proceed with cancelation of the reservation as they were also unable to get a hold of her.
I had to make alternative arrangements, which significantly impacted my trip.
I was very surprised given the reviews I read and superhost designation.