I loved Legacy of the Force and Fate of the Jedi, though they had some problems of course. I thought the 9 book format was just the right length, though the first 2-3 books tended to be very time-wasting. The journey of Jacen was really well done, though the ending was terrible. And for FOTJ I really really loved the villains and it had a strong ending, but the first 3 books could easily have been done in one.
Same here - slow starts, but good overall.
LOTF's biggest problem was a lack of coordination between the three authors. Traviss wanted the Mandalorians to be a bigger part of the story than Denning and Allston did, so her entries feel out of sync with the rest (and the whole series reads better if you skip most of the Mandalorian side story).
FOTJ started slow, but after Abyss they changed plans and added in things like the slavery subplot, which really helped the series. The whole "follow Jacen's path" storyline would have better suited a series of its own, I think. But the ending was amazing.