It depends on what you're after, the first person works because the story is really a character driven one, not just a typical high fantasy style swords and sorcery piece. Her non-Fitz/Fool books are written in third person, and it doesn't work very well imo.
But yeah, if you can get behind character driven low fantasy, it's absolutely worth the effort. If you're after epic battles and clashes between godlike heroes and demonic villains, you won't find it here - at least not in great quantities, and not as the focus.
The first 1/3 of book 1 is all setup anyway, so yeah, it can be slow and boring, but it builds up to bigger things later on. I'd say it's absolutely worth at least finishing book 1 and getting a bit of the way into book 2 to give you an idea of what the series is about, if by then you don't find it palatable, you probably won't like the rest.
For what it's worth, I've been reading fantasy voraciously since as long as I can remember, and The Fitz & Fool books are probably in my top 3 all time favorites.