Uneven but interesting First of all, there seems to be some chatter about how this series diverges from the original graphic novel. Since the writer of this series and the graphic novel are the same person, I have to assume that the series is an adequate representation of his work and differences, where they exist, are intentional or at least not altering the themes of his story in unwanted ways.
The elephant in the room is a different kind of representation. You will meet an abundance of ethnic and sexual minorities in this series and their presence is obviously intentional. If the mere presence of such representation is distasteful to you, then this series is really not for you. Personally, I thought that it often didn't really add anything to the story but rather weighed it down with narrative clutter creating an uneven pacing within and between episodes. My personal pet peeve of seeing certain minorties in historical eras where they have absolutely no good reason to be represented in certainly gets a few examples.
Generally speaking though, uneven is the key word for this series. On the one side you have great performances by seasoned actors like Charles Dance, who delivers his usual masterclass, opposite well-meaning amateurs like Stephen Fry. Some performances are a pleasant surprise, like Boyd Holbrook's work, whereas other cast members are so bland in their delivery that you can't even dislike them for their lack of talent. They are completely forgetable and they vanish like a dream.
Uneven also is the word for the pacing and the storytelling. Some of it is deep, brilliant and insightful, as the eternal is reflected in the fleeting nature of the human experience. This is where Gaiman's work really shines. Other parts and sometimes entire episodes are painful in their banality and, frankly, boring. The setup for the second half of the series also comes out of nowhere.
All things considered, it's an interesting series. However, it could have been much better if the main story arc had been streamlined more. Some snappier dialogue would also help. It's not a good sign when a talking raven get most of the fun lines.