Played the first - hated.
Playing the second - thoroughly enjoying, but it's just too sandbox at times. I can't take the world seriously, I can't take my death seriously, I can't take the plot or my actions seriously. It just seems like the Renaissance Fun Simulator. There's no risk in climbing shit when all you do is hold down two buttons and posit a direction - it'd feel so much more accomplished if it implemented a system like Shadow of the Colossus's, where you had to power up your jumps.
So, long story short, the whole series I feel is gooked and this'll be just yet another installation in the Climb Shit and Press Square to Assassinate Series.