Just downloading the trial now. One of the main gripes the reviews noted was that at launch a lot of the quests were broken so you didn't know if you missed something or if it was the game. Has this been fixed?
I've done about half to two thirds of all quests and I've still to find one broken, some are difficult and take quite a bit of thought. Occasionally I've thought one or two must be broken but it was more of a case I hadn't paid attention to the npc dialogue, your quest journal does not give enough information especially with investigation quests, taking notes helps.