Installed it on two 2013 rMBP's, so far with few issues.rMBP 1- Installation changed halfway through, and apple logo was off centre (believe this was down to me not having the display at pure retina resolution, so looked like it was displaying a 1280x800 image anchored to the bottom left of a 1440x900 screen).- Mail smart folders were removed, left with only Today. Was able to re-create them though with no issues.- New Disk Utility application. Ran first aid just to check for any permissions errors, but didn't seem to report any.rMBP 2- Installation didn't have the same issue as rMBP 1, believe that's because the display was set at pure retina before starting the installation.- Mail smart folders were retained on this computer.Overall it seems like a pretty solid release (obviously this may change across the betas), all the apps I use regularly work well so far.The new font on the fourms (San Francisco?) looks terrible on my external screen, but great on the built in retina