Great phone
Have had the note 9 for almost a year now and I love the phone. I didnt think I would like anything better than my note 4 but i do. I have been with Samsung for about eight years and I have had no problems with my phones. But this one is exceptional. I enjoy the ram size and the internal memory.
Water cooled graphics card; Ram size; Internal memory; Great display size; Great battery; Developer options; Pie operating system; The S pen; Overall quality wether it be usage or performance
None that I can think of as long as you know how to set up all the settings right and clean the phone regularly