I've enjoyed the Lost Fleet, and spinoff, series so far. Guardian specifically was decent. It was a little slow to begin, the first couple chapters rehashed so much information they may as well have said, "In our last episode..."
I think the governments in these series are becoming a bit too clichéd. Both the syndics and alliance. The various plots, schemes, and double-deals are going a bit overboard. They're, well, dumb. Some of the politicians may have risen to power without being too bright, but that can't be the norm. They're supposed to be motivated by self-interest, and they're theoretically capable of learning, so it's beginning to stretch the bounds of credibility that they keep shooting themselves in the foot.
The book was still entertaining. Decent amounts of action, and I still like the way combat is handled in the series. I'm really starting to wish the series would settle on who of the several different factions are the REAL badguys, and focus more on them. There's the syndics, internal alliance strife, a couple hostile aliens, and now a new faction introduced... While still good currently, with so many adversaries things are starting to become unfocused. I think things would be much more enjoyable if some of these threats could be dealt with or put aside and just one or two drove the plot.