The best bits are the conversations, characters and the chance to impact the story. Pretty much like Obisidian's (and their veteran Devs) track record. It's pretty great how many actions will be recorded and affect dialog (e.g. very rewarding when an important character is impressed with you for not taking lives, or never being seen)
Graphics and animations look poor, but I did get used to it after a few missions. Anyone who tells you the graphics are fine, even without considering this is a 2010 game, is delusional. This is coming from someone who has replayed Baldur's Gate 2 and Fallout 1/2 countless time, even just last year, so I am no graphics snob.
Like reviews say, gameplay is indeed mediocre at best. At times it was truly horrible, I have to say. Occasionally it has its moments, but I ended up rushing through levels towards the end of the game just to try get to the next 'RPGish' bit (i.e. talking to people about my actions and finding out how it will affect the story).
Reminds me of action movies. In most of those films, the poor dialog and story just interrupt the great shoot-outs and explosions, except in AP's case it's the other way around.