The first rule of musicals is that the songs must either drive the action forward or tell you something about the characters better than the spoken word.
This fails completely on the first count and mostly fails on the second: the music stops the action completely and the songs are too generic and rarely tell you anything that the (really good) acting doesn't. By the time I got to about episode 4 or 5 I was fast forwarding through the musical numbers to get on with the drama.
As a drama, I'm sorry the show was cancelled.
As a musical, it was a blessed relief.
Other than the music, I thoroughly enjoyed it. If it hadn't been on netflix with its ability to easily fast-forward, I would not have made it to the end of the series.