Excellent tenchu stealth vibe. Very nice envioronments, truly varied approaches can be taken to the same situation viably. high ground, sneak below, douse every torch anywhere till world a black cloak, high speed close up cheeky sneaks without violence. His hand to hand feebleness without stealth is GREAT. Stealth is in no way an 'option'. NPC reactions are pleasing too, a napping guard under torchlight will be awakened by sudden blackness of torch being put out (realistically) so, and unlike MGS and the undetectable creeping box in an empty room, they can pluck you right out of baskets, grates underfoot or reach under tables so hiding inches from wary guards feels tense and rewarding.
Climbing needs holds to be there, edges you can walk off with no magic safety net, leaping over a wall to drop out of sight will frequently kill you if you jump blind and drop far at all. Some people spoiled by Creed/Persia/Batman/Mordor find that objectionable. There loss to be honest. Great fun, and stealth where just fighting if spotted DOES NOT WORK AS A STRATEGY is a properly rewarding focussed game.
(Would bang)