After upgrading from 12.10 gnome remix to 13.04, everything has gone pretty well. My monitor glitches for a few seconds between login and loading the desktop, but then straightens out ok. The only problem is that my mint lmde partition isn't showing up in nautilus. Overall I'd say everyone working on this new release did a great job.
I decided to 'try upgrading' from 12.10 to 13.04 and found it painstakingly SLOW. I just gave up and did a fresh install - needed to clean up partitioning anyway. Fresh install proceeded without incident and everything worked OOTB. Installed Cinnamon theme and I think this system really rocks!
HP | Intel iCore 7 3.2Ghz | 12 Gb mem | SSD Win7 | HDD Trusty | Mate 16.04
Dell laptop | Intel iCore 3 2.1Ghz | 4 Gb mem | MATE 16.04 + Win 7