Well, given the immense irritation previous games have given me when my game freezes for no apparent reason, this game Skyrim has been way more reliable. I hardly ever have a freeze, and I've learned that when I do (usually in the save dialog) if I leave it be for 5 minutes or so, it unfreezes (PS3 slim). So I have to say they have the stability much better. I have had some broken quests, but nothing that was game ending. On the whole good job. Keep working out those bugs.
I am by the way a Software Engineer so I know how hard it is to shake those bugs out in a program as complex as this.