While the OS is still in beta, and fist update came yesterday, i'm very happy Jolla user. My old nexus 7 is getting dust, while Jolla has come my primary device. There is still some problems that annoys very much, like i personally cant get exchange sync to sync my contacts, while everything else works.
UI is intuitive with very good response. Camera is not so good, but this probably will improve with software, as were the case with N9. Android software "works" mostly good, but when you install enough android software, some applications comes very unstable, or wont start at all (like angry birds..)
As former N9 user, i dont anymore feel the need to go back. This is far better than N9, but navigation is not near "Nokia experience", actually its crappy at the moment.