Not only is this a great series, but the length of it makes it an awesome value as many audiobooks which sell for more and considerably shorter.
I'm about 20% into the 4th book and so far my only complaint (other then the writer's tendancy to kill off the characters I like) is that while the narrator for them is all the same in book 4 he's voicing the characters totally differently which hurts the immersion factor of the audiobooks since it keeps pulling me out of the story over and over again
Overall I would give the story 5 stars but as this is a review of the audiobooks I have to take off one star for the character voicing issue (hopefully I'll get used to it, but all things being equal I'd prefer he go back to the old voicing.)