I've had 1308 since March and GDR2/Amber since 1 week. it's great, you will notice it was worth to wait, plenty of improvements. Smart Cam App is great also.
FM Radio in Music Hub, Flip to Silence in audio settings, lumia color profile in display+touch... If you have updated system apps you should have call/sms blocking option in settings.
Also If you open taken photo via gallery you will notice it becomes sharper (better quality) after few seconds, changed camera algorithms (improved) - better photos