The first book in the Terok Nor trilogy is great. The other 2 books are pretty good but aren't quite up to par with the first one. I thought this was the better of the 2 trilogies.
I liked the first book in the Millennium trilogy but each one after that got successfully worse for me and it was a steep drop, as in I didn't care for the third book much at all.
each do different things, and do each brilliantly.