Any opinions on the Sonno Notte Mattress by SFERRA?
Hi cmel.
Welcome to our Mattress Forum. 
I looked up this mattress but was unable to find the specifications necessary to make a meaningful evaluation.
I would suggest, if you haven’t already, ready through our Mattress Durability Guidelines. I would also recommend these Mattress Shopping Guidelines and Specifications you need you know.
If any other questions come up, we are happy to help!
NikkiTMU