Figured I'd weigh in since I started the thread back on FOH. The first trilogy was, to me, a refreshing change of pace from "typical" high fantasy that is marketed these days (Wizards of the Coast, I'm looking at you). I do agree the First Law trilogy has its flaws, but overall was a very interesting take on a typical fantasy tale that sadly fell apart towards the end.
The standalone books (barring Best Served Cold) were, for sure, much better--which is to be expected as an author "evolves." Both The Heroes and Red Country are two of my favorite books period.