Biggest plus for me is the ability to get the sdcard to recognize in the libraries. No more VHDs and other weird tweaks to get the music/video apps to recognize files. This alone outweights any draw backs for me.
I did the install yesterday, but dind't have much time to mess with it yet, so i brought to work to play around later at lunch. I had 11 gb of space when i did the install and it increased to 13 gb, so a 2gb increase after update. WIll need to go to disk management to see if i can delete any more, but it opened up quite a bit of storage.
Outlook RT is on here which is nice, i like it better than the mail app which wasn't improved. Improvements to the mail app wont come until the final release i think i read. So will use the outlook RT for the time being.
I had a bunch of apps ready to DL since i think the app list is saved somewhere, so i just pressed the arrow on the icon and it downloaded quickly. No more having to go to the store do download everything, much easier.
What i thought the preview had was the seamless background that covers both the metro start menu and the traditional desktop. Is that in preview or in the final release only?
I remember reading about the app list being pulled up from the button, i thought it was a swipe up, but really it is hitting the arrow. This doesnt matter, but confused me for about 15 seconds.
THe surface RT wasn't any much fastter to me in terms of apps opening or browsing, seems to be the same. So i dont think the preview addressed any of the sluggishness when opening apps and browsing.