After installing the console, we are surprised by its small size. Contrary to some people, the console is really silent. There is some rotating disk (pdt makes the installation) but after it's really lightweight. No trouble to do on that side. The first update (not required to play) has done fairly quickly.
The interface has been greatly improved. It's really fluid. We pass from one application to another instantly. During a game, you can return to the console menu and vice versa.
I also appreciate being able to do the installations in the background (you can start playing while the game over to settle) and the same goes for the updates :) No more long waits!
Basically, everything is more fluid and fast!
About games, Killzone is very impressive. We immediately feel we are on a new generation console.
For now, I am very satisfied with my purchase!