Fine, enjoyable, a little bit on the sarcastic and mischievous side.
I enjoyed it, and of course, it makes sense only if you are a trekkie. There are too many tongue-in-cheek jokes that are more of insider jokes, but also there are some quite interesting and serious observations.
The book is heavily illustrated, but the illustrations are not excessive and are harmoniousness in the fabric of the book.
I love Star Trek, but the older version of Star Trek is somewhat dated to me. Of course, it is sci fi, so it gets out of date quickly, but because the author mostly focuses on philosophy, the dated nature of the old Star Trek universe is nearly unnoticeable.
I did enjoy it, and it is a nice coffee table read unless my cats decide to attack it.