I read the whole series, and all the extra books after and I can sat it can be a slog. For most of it I would say it is about as enjoyable as you're average action movie. Not particularly well done but fun.

There is about a book and a half that is just about rugby. It's like the author just discovered that it existed.

There's another that is about how communism is bad and capitalism is good.

So, take from that what you will.