I loaded anna on my N8 last night with no trouble whatsoever.I cant say ive noticed a great difference personally.I dont use my phone for Emails or much browsing(this does seem faster now btw}
Unlike most,i quite like the B&W layout but i DONT like the new widgets,look like they were designed by 4 year olds.
Not fiddled with the camera as such yet.Dont know if anything has changed.
Update your phones with confidence i say and im a technophobe to a degree.
ITS NOT ALL DOOM AND GLOOM, but for me,its still just a device i use to make/recieve calls,text,take photo's with and use the maps(using my own innitiative to get around its faults)
oh and the keyboard seems smaller(i dont use qwerty)