I ended up reading this on his own website, I'm currently in book 11 so the reviews for book 1-10 will be the same.
I think this series is pretty decent, otherwise I wouldn't already be on book 11. I actually think the story is very well made and almost all the characters are good/interesting and fun to follow, most storylines are interesting.
My biggest problem and why I'm giving it 4 stars is that it just jumps too much between characters. Every single time a storyline drags me in and has all my attention it switches to a totally different (group of) character(s) and I get pulled a bit out of the story. This doesn't just happen once, this happens virtually every chapter change and it's very jarring. I think either the chapters need to be a lot longer or the storylines need to be solved further before switching completely unrelated characters.
I will keep reading it because the story is good, but for me it could've been amazing/great if this didn't happen while reading.