Not ready yet as least as far as my one production machine is concerned. Besides strange errors after install and accessibility showing up after log in, there was a catastrophic meltdown over EFI. I could not get v18 to work as it kept saying it could not find an acpi screen. It worked fine for about a day after what I thought were minor glitches and they seemed solved by a reinstall. Then today the ACPI problem. I could not get the boot to work at all. I rolled back to v17.3 and I think I will wait for a point release or simply monitor the net to see if others have had these challenges and if there was a response to it. Seems I may have to hit the upgrade path when the coast is clear. The ISO I downloaded this week of the release does not seem ready for prime time.