I've heard many bad tales about this game... horror stories how bad it is. How you had to avoid it.
I didn't care; and played it anyway... and I am so glad that I did. This is a GREAT RPG. Great!
The story is intense, adult and interesting. There are some weavements in to the show (and books?) that you probably understand better than me if you watched/read them. Even if you didn't you can still easily follow this game's plotline and enjoy it. It truly is one of the best story-lines I have experienced in a game.
So good infact that yes, it allows one to overlook the weaker points of this game. It starts rather slow, but name me one RPG that doesn't. It's very conversation-heavy, which would scare off some, but is like the perfect thing for me and many RPG-fans. There can be very large stints without combat or "action"
Which is good, since the combat isn't exactly amazing. While complex enough, with various armor and damage types, many skills and abilities it's just... jarring. It's usually not much fun, which makes it fortunate it usually doesn't last that long. Mostly it consists of finding good combo's (x knocks out, y does bonus damage on knocked down foes) and hope for the best. I've lost fights heavily, and then won them using the exact same tactics without loosing any health at all on reload, so the combat results can be highly random.
Back on the good side; this game features *many* great additions many RPG's could profit from having. The 2 storylines that start appart and closely come together and merge and then allows you to make the end-choice is great. It really helps avoiding story-fatigue if you don't get all of it in a large mesh-up. Downside is that you have to pay attention, it can be confusing if you don't. This is not a game just to relax and not think. You need to pay attention. Another great action is the dog, allowing you to sniff out clues, hidden rewards and take down lone guards (very advised since aforementioned combat). The counter-part fire view is sorely lacking in comparrison.
Other great additions you will notice throughout, and might be spoilerish so I wont go into details expect that you really should loose the boss-fight once. That's just pure genious that other games lack, you'll know what I talk about when you see it.
Another downside is the extremely unoptimalised graphics. You'll often notice stuttering, and FPS might drop to it's knees looking at a wall, while a giant city-overview runs fine. This stuttering behavior can make it hard to navigate about and is overall extremely annoying, and probably the single most giant downside of this game sadly enough. It looks good enough, but it's performance is terrible. Some areas of the city I tried avoiding just because I knew they would drop my framerate to it's knees.
However, I really suggest to get yourself through the horrors of the optimalisation and (infrequent) combat to experience what this game's plotline and conversations have to offer you. You'll not regret it playing to the end and experience it all. Definitely one of the biggest surprises to me these last few years. No RPG fan should miss this one out...