Pros: artstyle, soundtrack, and general tightness of the controls. There's a good stealth platformer idea here.
Cons: Less a difficulty curve, more a difficulty mountain range that peaks and valleys at irregular intervals. Less a stealth game, more a precision platformer, emphasis on precision. Enemies spot you quicker than they turn around, but it's really about the timed jumping and use of your cloak.
Play at your own risk. Mark of the NInja or Shadow Tactics, this is not