After a long wait for the final Terra Ignota volume, Perhaps The Stars does not disappoint. Yes, there are parts that on and on, but they work if you've bought in to the previous books. There is even in-story justification for this that was started in The Will to Battle.
The dense prose we've come to expect continues here, and I feel I need to complete a reread before I can write much more of a review.
In short, if you liked the previous novels then this is an extremely satisfying conclusion. Those who found the prior works to be more of a struggle won't have any relief here.