It's slow and annoying, until about halfway where it gains some momentum, and the ending was a blast. That being said if you get too bored with episode 1, jump to episode 7 and watch to the ending then go back if you want to pick up the loose ends.
The music is IMO really good; shedding guitars, thumping bass, grooving drums, and keys straight from the 80's.
The art style especially on the sci-fi scenes really fits, but the best visual on the show is the psychedelic moments hands down. The everyday scenes I find less noteworthy.
Some of the characters really annoy me with just plain stupidity probably added for humor or something.
Overall had it not been for the extremely sluggish start it would have been quite good.