Somewhere between 3 and 4 really. Though closer to 4.

A well written space opera. It's got your usual intrigue, AIs, and aliens. Sides kinda on the fantasy side of things than the sci-fi, but not overly so.

Strengths:

Diverse cast
Multiple interesting plot lines
Interesting setting

Weaknesses:

Some characters felt a bit thin - caricature even, particularly the ones that weren't main characters
Plot lacked a motor for me. The incoming switch over between winter and summer wasn't played up enough to realise that's what it was supposed to be
A few plot holes regarding the AI made it feel a bit deus ex (always a risk with AIs)