I spent 16 hours on dragonfall, which includes re-doing large parts of the last dungeon. (edit: on very hard of course)
Anyways the end game is pretty shit, and really highlights the games flaws. Dungeon crawling goes poorly with this games system is reason #1, and the forced conversation options gets jarring because the villain is pretty obviously right, whereas all you get to say are [snarky]"you're wrong" [blunt]"you're wrong" [angry]"you're wrong"[etiquette:academic]"I believe that you may be mistaken". Then there is a debriefing where everyone feels good about themselves in the typical clicheed fashion ("i'd want it no other way"), and an epilogue which illustrates why the "villain" was right after all.
As a whole the game is kinda unfocused. You do random missions that are not really related to the end, and the ending was bad as well. Plot fails like that. The best part of the game is the middle probably. Also their writing is getting... Tiring. All the pseudoedgy companions, the troll librulism dispensers, general writing style, and so on.
Far as RPGs go, it's not bad, not good, just ok.