I was really looking forward to juno, unfortunately this makes my system even more unstable than before with loki.
As soon as I click Epiphany, Pantheon will reset to the login screen, while I am able to log back in, there is no Dock, no top-bar no nothing... this does not happen with Firefox though, FF will just crash after a few minutes.
Also the additional drivers menu is not shown in settings, which was there in Loki. After manually installing software-properties, I can see the Nvidia 390 driver but no chipset driver (which was there in Loki).