Finally picked this up today, was very indecisive... ended up being lazy and purchasing digital, so there's no going back.
I put about 3 hours in on my first sitting and I'm really enjoying it (20% completion). The game is gorgeous, but the combat and movement are fun, I think it'll be a while before I could get tired of whipping enemies with chains Kratos-style, or zipping from building to building while raining explosive blasts from my palms. The combat gameplay is very simple, but the animations and fluidity keep me wanting more.
The story grabbed me at the beginning and has kept me so far, but the reviews did mention there is a steady decline throughout the game, I have yet to see how I feel about that. I played the first infamous and I wasn't a huge fan, but I felt it was a decent game. So far I'm enjoying this one a lot more.
I'm currently taking the evil path and as mentioned above it's quite funny how Reggie dismisses all evil acts Delsin does, yet harshly criticizes those of others. I think that the good path might make for a better playthrough the first time around.