Yeah, I've read all of NJO. They weren't too bad! While they were no where near the quality of say The Han Solo Trilogy, they were pretty good. They even threw crap at the fan and changed/killed off people!
That said, there is one minor disappointment of the series: I knew how it was going to end from the very first book on. I won't spoil it for anyone who has never read them, but basically I was reading the books just waiting for the characters to figure out what I had.