If you were to ask me what I though about Un-Go after watching the first few episodes I probably would've said "boring, horrible character development, terrible pacing and lack of a plot. If you were to ask me now after seeing all the episodes I would say "brilliant, unique storytelling and interesting characters".
Un-Go starts off from the generic 'future Japan' setting, using guess work you try to make sense of the plot and characters which is difficult and leaves you feeling like it's taking off from a prequel series. Though the backstory shines through little by little each episode and you can piece it together (which fits into the detective mystery genre nicely).
The main issue i had with the early episodes of Un-Go was pacing. It felt as if they were cramming in two-parters into one episode which left a long path of plot holes along the way. At the end of the episode, you'd be thinking "what just happened" "is that the ending?" "Why don't I just drop this crap" but thankfully this issue is resolved later on.
I first thought the characters were really boring and bland, probably because the character development was nearly non-existent among the confusing plots and side characters in the first few episodes. Though you soon get attached to them, well most of them anyway.
The art style is interesting and the character designs aren't too bad, though I really hated the design for 'that woman' (call her this to avoid spoilers). She looked like some out of proportion alien thing.
I liked the OP and the ED wasn't that bad. The voice acting is average.
Overall, Un-Go has it's flaws through features the 'detective/mystery' genre at it's best. It starts off as a terrible anime, filled with poor character development, plot holes and pacing issues though finishes off with a nicely polished interesting series which leaves you wanting more.
