I liked some of the ones after the second more than the second. But I honestly wish I'd stopped at the first. It is such an amazing story that gives life to an incredibly interesting and well built universe. Then, having built that wonderful universe, the follow-on books got bored with it and decided to focus on ... fancy sounding bullshit, for lack of any better description. Going back to the first book, I see that the flaws were there already, but they were in service of building the world, while that relationship flipped afterward.