It's inFAMOUS, but again
It improves on some stuff, more variety in abilities, quicker movement around the map and choices being a bit more impactful for example
But it also keeps some flaws like the really poor optimization. I played the last game emulated and I mostly blamed the emulation for the poor performance, but this time I played it on the real hardware and it was a just barely better experience.

Overall inFAMOUS 2 is the sequel to one of the games of all time, but not thaat special.