Just completed this, my views:
+More Deus Ex
+Acceptable storyline
+Some very good effects during the riots
+Sense of humour to lighten the mood when reading emails etc
+Reasonable variety of situations in terms of choosing what augs to use, I made use of hacking, jumping, persuasian, EMP protection, Typhoon, Wall Punch etc in various places
+Nice to learn a few snippets of background about some of the characters from Deus Ex
+Excellent performance, 90+ fps
+No idea why people are complaining about load times they were only a few seconds, often I didn't even have time to read the text on the intermission screen
-Seems to be far too many things to hack, making the minigame get very boring after a while (I maxed out hacking very early on as I wanted to break into all the Sarif Industries offices)
-Game ends rather abruptly, I was expecting at least another location
-Nightclub sucks compared to those in the first two games
-Doesn't throw enough missions at you, I can't remember ever having more than 2 sidemissions active at once
-Inventory management gets annoying after a while, especially when it comes to picking up ammo for a weapon that isn't fully loaded - you have to drop something else, pick up the ammo, load it into the gun, and then pickup the item you dropped.
-Graphically not that impressive, it's all a bit 2008
-No melee attack without energy cells kinda sucks, was really annoying on one side mission where you can't use force, had to take out about 6 bodyguards one by one then run away and hide while my energy recharged.
-AI doesn't follow you enough e.g. if you come round a corner guns blazing then retreat they should know which way you went rather than randomly looking around the place
As for the boss fights not sure what all the fuss is about, 3rd boss is supposed to be the hardest but it was the easiest for me, I just shot him 4 times with the grenade launcher and he died having barely moved from his starting position, all over in about 10 seconds. I guess if your character is heavily dependent on augs it might be tricky but as long as you have a powerful weapon it shouldn't be too difficult. Same goes for the first two bosses in fact, Boss1 I just threw out those remote explosive devices and blew him up, second boss I blazed away with Heavy Rifle before finishing her off with a couple of Typhoons.