It feels so friggin good! Lots of improvements over the PS3 controller which to this day is unsatisfying in almost every way.
The PS4 controller is basically as light but feels much more sturdy. They put a textured plastic that covers the bottom half, it's not something I would have pin pointed but it was the first thing that struck me and it's of weirdly huge benefit to the controller. The thumbstick clicks feel basically the same but the R2 and L2 triggers now curve out (obviously) and have much more resistance and bounce back compared to the DS3. I didn't think to mess too much with R1 and L1 but they struck me as pretty similar to DS3, maybe a little more bouncy, kinda like the PS Vita shoulder buttons but with less of a cheap plastic feel.
Not sure if anyone cares at this point, but I was really impressed.